* configure.in (AC_CHECK_HEADERS): Add limits.h.
        * configure, config.in: Regenerate.
        * sort.c: Portably #include <limits.h> and/or <sys/param.h>.
        * strtol.c, strtoul.c: #include "config.h". Portably #include
        <limits.h> and/or <sys/param.h>.
        * Makefile.in (strtol.o, strtoul.o): Update dependencies.

Co-Authored-By: Jeffrey A Law <law@cygnus.com>

From-SVN: r35211