pgsql: Remove strdup, strtol, strtoul from libpgport

Remove strdup, strtol, strtoul from libpgport

These should not be needed anymore, at least after the recent port
removals. So let's see whether we can do without them.

Branch
------
master

Details
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http://git.postgresql.org/pg/commitdiff/3284e03d5d791e953e8c7eba25f1afb00c62e4a4

Modified Files
--------------
configure | 5 +-
configure.in | 2 +-
src/include/pg_config.h.in | 9 ---
src/include/pg_config.h.win32 | 9 ---
src/include/port.h | 4 -
src/port/strdup.c | 28 --------
src/port/strtol.c | 149 -----------------------------------------
src/port/strtoul.c | 119 --------------------------------
8 files changed, 2 insertions(+), 323 deletions(-)