pgsql: Fix ecpg -? option on Windows, add -V alias for --version.

Fix ecpg -? option on Windows, add -V alias for --version.

This makes the -? and -V options work consistently with other binaries.
--help and --version are now only recognized as the first option, i.e.
"ecpg --foobar --help" no longer prints the help, but that's consistent
with most of our other binaries, too.

Backpatch to all supported versions.

Haribabu Kommi

Discussion: <CAJrrPGfnRXvmCzxq6Dy=stAWebfNHxiL+Y_z7uqksZUCkW_waQ(at)mail(dot)gmail(dot)com>

Branch
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REL9_5_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/7c177ddc291692e5c7c41279b0488936283626f7

Modified Files
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src/interfaces/ecpg/preproc/ecpg.c | 47 +++++++++++++++-----------------------
1 file changed, 18 insertions(+), 29 deletions(-)