Sun Aug 2 18:52:05 EDT 1998 Nathan Bryant <bryant@cs.usm.maine.edu>

Sun Aug  2 18:52:05 EDT 1998 Nathan Bryant <bryant@cs.usm.maine.edu>
	* config_defs.h: new file, contains external declarations from config.c
	* config.c: moved defs to config_defs.h, use PATH_MAX from <limits.h>
	  for bbs_home_directory
	* mailinglist.c, support.c: include <string.h>
	* sysoputil.c: include <string.h>, <limits.h>, "config_defs.h", remove
	  duplicated defs, replace gets() call with fgets()
	* user_ops.c: define _XOPEN_SOURCE_EXTENDED