pgsql: Retire escapeConnectionParameter().

Retire escapeConnectionParameter().

It is redundant with appendConnStrVal(), which became an extern function
in commit 41f18f021a0882eccbeca62e2ed4b66c6b96e9c9.  This changes the
handling of out-of-memory and of certain inputs for which quoting is
optional, but pg_basebackup has no need for unusual treatment thereof.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/9132c014290d02435999c81892fa8b0b384497d8

Modified Files
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src/bin/pg_basebackup/Makefile        |  1 +
src/bin/pg_basebackup/pg_basebackup.c | 69 ++---------------------------------
2 files changed, 4 insertions(+), 66 deletions(-)