pgsql: pg_restore: Remove unnecessary strlen() calls in options parsing

pg_restore: Remove unnecessary strlen() calls in options parsing.

Unlike pg_dump and pg_dumpall, pg_restore first checks whether the
argument passed to --format, --host, and --port is empty before
setting the corresponding variable. Consequently, pg_restore does
not error if given an empty format name, whereas pg_dump and
pg_dumpall do. Empty arguments for --host and --port are ignored
by all three applications, so this commit produces no functionality
changes there. This behavior should perhaps be reconsidered, but
that is left as a future exercise. As with other recent changes to
option handling for these applications (commits b2898baaf7,
7c8280eeb5, and be0d0b457c), no back-patch.

Author: Mahendra Singh Thalor <mahi6run(at)gmail(dot)com>
Reviewed-by: Srinath Reddy Sadipiralla <srinath2133(at)gmail(dot)com>
Discussion: https://postgr.es/m/CAKYtNApkh%3DVy2DpNRCnEJmPpxNuksbAh_QBav%3D2fLmVjBhGwFw%40mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/ec80215c033dfbea0e864b955ec9d2c0a7f4a4ca

Modified Files
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src/bin/pg_dump/pg_restore.c | 9 +++------
src/bin/pg_dump/t/001_basic.pl | 7 ++++++-
2 files changed, 9 insertions(+), 7 deletions(-)