pgsql: Promote pg_dumpall shell/connstr quoting functions to src/fe_uti

Promote pg_dumpall shell/connstr quoting functions to src/fe_utils.

Rename these newly-extern functions with terms more typical of their new
neighbors.  No functional changes; a subsequent commit will use them in
more places.  Back-patch to 9.1 (all supported versions).  Back branches
lack src/fe_utils, so instead rename the functions in place; the
subsequent commit will copy them into the other programs using them.

Security: CVE-2016-5424

Branch
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REL9_4_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/6df8ff49d9ea6ce2386d50deffff85503bc9fcd3

Modified Files
--------------
src/bin/pg_dump/pg_dumpall.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)