and vacuumdb.
ITAGAKI Takahiro, with minor fixes from me.

back-stamped for this.

(possibly (un)translated) letters that are actually expected as input.
Also reject invalid responses instead of silenty taken them as "no".

with help from Bernd Helmle

by forcing search_path to be just pg_catalog.

macros around strings that were missing them.

Add locale to pg_ctl.c.

Adjust get_*_path functions to be limited to MAXPGPATH.

getopt_long().  This is more or less the same problem as we saw earlier
with getaddrinfo() and struct addrinfo, and for the same reason: random
user-added libraries might contain the subroutine, but there's no
guarantee we will find the matching header files.

connections, increase robustness, add NLS, and prepare for Windows port.
(vacuumdb and clusterdb will follow later.)