pgsql: A collection of small fixes for the SCRAM patch.

A collection of small fixes for the SCRAM patch.

* Add required #includes for htonl. Per buildfarm members pademelon/gaur.

* Remove unnecessary "#include <utils/memutils>".

* Fix checking for empty string in pg_SASL_init. (Reported by Peter
Eisentraut and his compiler)

* Move code in pg_SASL_init to match the recent changes (commit ba005f193d)
to pg_fe_sendauth() function, where it's copied from.

* Return value of malloc() was not checked for NULL in
scram_SaltedPassword(). Fix by avoiding the malloc().

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/95c1dbcdfffcc3a77e693c3c2759e26a01f465c8

Modified Files
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src/common/scram-common.c | 30 ++++++++++--------------------
src/interfaces/libpq/fe-auth.c | 7 ++++---
2 files changed, 14 insertions(+), 23 deletions(-)