pgsql-server: Fix Cygwin defines to be consistent.

Log Message:
-----------
Fix Cygwin defines to be consistent.

Modified Files:
--------------
    pgsql-server/src/backend/libpq:
        be-secure.c (r1.48 -> r1.49)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/libpq/be-secure.c.diff?r1=1.48&r2=1.49)
    pgsql-server/src/backend/postmaster:
        postmaster.c (r1.424 -> r1.425)

(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/postmaster/postmaster.c.diff?r1=1.424&r2=1.425)
    pgsql-server/src/include:
        c.h (r1.168 -> r1.169)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/c.h.diff?r1=1.168&r2=1.169)
        port.h (r1.59 -> r1.60)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/port.h.diff?r1=1.59&r2=1.60)
    pgsql-server/src/include/port:
        win32.h (r1.31 -> r1.32)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/port/win32.h.diff?r1=1.31&r2=1.32)
    pgsql-server/src/interfaces/ecpg/include:
        sqlca.h (r1.26 -> r1.27)

(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/interfaces/ecpg/include/sqlca.h.diff?r1=1.26&r2=1.27)
    pgsql-server/src/port:
        dirmod.c (r1.22 -> r1.23)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/port/dirmod.c.diff?r1=1.22&r2=1.23)