pgsql: doc: Properly punctuate "etc."

doc: Properly punctuate "etc."

Branch
------
master

Details
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https://git.postgresql.org/pg/commitdiff/648aa6734fefb2cc2c9bba7d6444890e727eaca1

Modified Files
--------------
doc/src/sgml/arch-dev.sgml     |  2 +-
doc/src/sgml/bki.sgml          |  4 ++--
doc/src/sgml/config.sgml       |  4 ++--
doc/src/sgml/datetime.sgml     |  2 +-
doc/src/sgml/ddl.sgml          |  2 +-
doc/src/sgml/extend.sgml       |  2 +-
doc/src/sgml/func.sgml         |  2 +-
doc/src/sgml/glossary.sgml     |  2 +-
doc/src/sgml/libpq.sgml        |  8 ++++----
doc/src/sgml/manage-ag.sgml    |  2 +-
doc/src/sgml/plperl.sgml       |  6 +++---
doc/src/sgml/pltcl.sgml        |  2 +-
doc/src/sgml/postgres-fdw.sgml |  2 +-
doc/src/sgml/protocol.sgml     | 12 ++++++------
doc/src/sgml/ref/values.sgml   |  2 +-
doc/src/sgml/sources.sgml      |  4 ++--
doc/src/sgml/syntax.sgml       |  2 +-
doc/src/sgml/xfunc.sgml        |  2 +-
doc/src/sgml/xml2.sgml         |  2 +-
19 files changed, 32 insertions(+), 32 deletions(-)