pgsql: Rename files and headers related to index AM

Rename files and headers related to index AM

The following renaming is done so as source files related to index
access methods are more consistent with table access methods (the
original names used for index AMs ware too generic, and could be
confused as including features related to table AMs):
- amapi.h -> indexam.h.
- amapi.c -> indexamapi.c.  Here we have an equivalent with
backend/access/table/tableamapi.c.
- amvalidate.c -> indexamvalidate.c.
- amvalidate.h -> indexamvalidate.h.
- genam.c -> indexgenam.c.
- genam.h -> indexgenam.h.

This has been discussed during the development of v12 when table AM was
worked on, but the renaming never happened.

Author: Michael Paquier
Reviewed-by: Fabien Coelho, Julien Rouhaud
Discussion: https://postgr.es/m/20191223053434.GF34339@paquier.xyz

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/8ce3aa9b5914d1ac45ed3f9bc484f66b3c4850c7

Modified Files
--------------
contrib/bloom/blinsert.c                                   |  2 +-
contrib/bloom/bloom.h                                      |  2 +-
contrib/bloom/blutils.c                                    |  2 +-
contrib/bloom/blvacuum.c                                   |  2 +-
contrib/bloom/blvalidate.c                                 |  2 +-
contrib/sepgsql/database.c                                 |  2 +-
contrib/sepgsql/label.c                                    |  2 +-
contrib/sepgsql/proc.c                                     |  2 +-
contrib/sepgsql/relation.c                                 |  2 +-
contrib/sepgsql/schema.c                                   |  2 +-
src/backend/access/brin/brin_inclusion.c                   |  2 +-
src/backend/access/brin/brin_minmax.c                      |  2 +-
src/backend/access/brin/brin_validate.c                    |  2 +-
src/backend/access/common/detoast.c                        |  2 +-
src/backend/access/common/toast_internals.c                |  2 +-
src/backend/access/gin/ginvalidate.c                       |  2 +-
src/backend/access/gist/gistbuild.c                        |  2 +-
src/backend/access/gist/gistbuildbuffers.c                 |  2 +-
src/backend/access/gist/gistget.c                          |  2 +-
src/backend/access/gist/gistvacuum.c                       |  2 +-
src/backend/access/gist/gistvalidate.c                     |  2 +-
src/backend/access/hash/hashvalidate.c                     |  2 +-
src/backend/access/heap/heapam.c                           |  2 +-
src/backend/access/heap/heapam_handler.c                   |  2 +-
src/backend/access/heap/vacuumlazy.c                       |  2 +-
src/backend/access/index/Makefile                          |  8 ++++----
src/backend/access/index/indexam.c                         |  2 +-
src/backend/access/index/{amapi.c => indexamapi.c}         |  6 +++---
.../access/index/{amvalidate.c => indexamvalidate.c}       |  6 +++---
src/backend/access/index/{genam.c => indexgenam.c}         |  8 ++++----
src/backend/access/nbtree/nbtvalidate.c                    |  2 +-
src/backend/access/spgist/spgdoinsert.c                    |  2 +-
src/backend/access/spgist/spginsert.c                      |  2 +-
src/backend/access/spgist/spgscan.c                        |  2 +-
src/backend/access/spgist/spgutils.c                       |  2 +-
src/backend/access/spgist/spgvacuum.c                      |  2 +-
src/backend/access/spgist/spgvalidate.c                    |  2 +-
src/backend/bootstrap/bootstrap.c                          |  2 +-
src/backend/catalog/aclchk.c                               |  2 +-
src/backend/catalog/catalog.c                              |  2 +-
src/backend/catalog/dependency.c                           |  2 +-
src/backend/catalog/heap.c                                 |  2 +-
src/backend/catalog/index.c                                |  2 +-
src/backend/catalog/indexing.c                             |  2 +-
src/backend/catalog/objectaddress.c                        |  2 +-
src/backend/catalog/partition.c                            |  2 +-
src/backend/catalog/pg_collation.c                         |  2 +-
src/backend/catalog/pg_constraint.c                        |  2 +-
src/backend/catalog/pg_db_role_setting.c                   |  2 +-
src/backend/catalog/pg_depend.c                            |  2 +-
src/backend/catalog/pg_enum.c                              |  2 +-
src/backend/catalog/pg_inherits.c                          |  2 +-
src/backend/catalog/pg_largeobject.c                       |  2 +-
src/backend/catalog/pg_publication.c                       |  2 +-
src/backend/catalog/pg_range.c                             |  2 +-
src/backend/catalog/pg_shdepend.c                          |  2 +-
src/backend/catalog/pg_subscription.c                      |  2 +-
src/backend/commands/analyze.c                             |  2 +-
src/backend/commands/cluster.c                             |  2 +-
src/backend/commands/comment.c                             |  2 +-
src/backend/commands/constraint.c                          |  2 +-
src/backend/commands/dbcommands.c                          |  2 +-
src/backend/commands/extension.c                           |  2 +-
src/backend/commands/functioncmds.c                        |  2 +-
src/backend/commands/indexcmds.c                           |  2 +-
src/backend/commands/matview.c                             |  2 +-
src/backend/commands/opclasscmds.c                         |  2 +-
src/backend/commands/policy.c                              |  2 +-
src/backend/commands/proclang.c                            |  2 +-
src/backend/commands/publicationcmds.c                     |  2 +-
src/backend/commands/seclabel.c                            |  2 +-
src/backend/commands/tablecmds.c                           |  2 +-
src/backend/commands/trigger.c                             |  2 +-
src/backend/commands/tsearchcmds.c                         |  2 +-
src/backend/commands/typecmds.c                            |  2 +-
src/backend/commands/user.c                                |  2 +-
src/backend/commands/vacuum.c                              |  2 +-
src/backend/executor/execAmi.c                             |  2 +-
src/backend/executor/execCurrent.c                         |  2 +-
src/backend/executor/execIndexing.c                        |  2 +-
src/backend/executor/execReplication.c                     |  2 +-
src/backend/executor/nodeBitmapIndexscan.c                 |  2 +-
src/backend/executor/nodeIndexonlyscan.c                   |  2 +-
src/backend/optimizer/path/costsize.c                      |  4 ++--
src/backend/optimizer/plan/planner.c                       |  2 +-
src/backend/optimizer/util/plancat.c                       |  2 +-
src/backend/parser/parse_utilcmd.c                         |  2 +-
src/backend/partitioning/partdesc.c                        |  2 +-
src/backend/replication/logical/origin.c                   |  2 +-
src/backend/rewrite/rewriteRemove.c                        |  2 +-
src/backend/statistics/extended_stats.c                    |  2 +-
src/backend/storage/large_object/inv_api.c                 |  2 +-
src/backend/utils/adt/amutils.c                            |  2 +-
src/backend/utils/adt/enum.c                               |  2 +-
src/backend/utils/adt/ruleutils.c                          |  2 +-
src/backend/utils/cache/catcache.c                         |  2 +-
src/backend/utils/cache/evtcache.c                         |  2 +-
src/backend/utils/cache/relfilenodemap.c                   |  2 +-
src/backend/utils/cache/ts_cache.c                         |  2 +-
src/backend/utils/init/postinit.c                          |  2 +-
src/include/access/brin_internal.h                         |  2 +-
src/include/access/gin_private.h                           |  2 +-
src/include/access/gist_private.h                          |  4 ++--
src/include/access/gistscan.h                              |  2 +-
src/include/access/hash.h                                  |  2 +-
src/include/access/{amapi.h => indexam.h}                  | 14 +++++++-------
src/include/access/{amvalidate.h => indexamvalidate.h}     | 12 ++++++------
src/include/access/{genam.h => indexgenam.h}               | 14 +++++++-------
src/include/access/nbtree.h                                |  2 +-
src/include/access/reloptions.h                            |  2 +-
src/include/access/spgist.h                                |  2 +-
src/include/executor/nodeIndexscan.h                       |  2 +-
src/include/nodes/nodes.h                                  |  2 +-
src/include/nodes/pathnodes.h                              |  2 +-
src/include/utils/index_selfuncs.h                         |  4 ++--
src/include/utils/rel.h                                    |  2 +-
src/test/modules/dummy_index_am/dummy_index_am.c           |  2 +-
117 files changed, 147 insertions(+), 147 deletions(-)