* support autoconf 2.53

 * support autoconf 2.53
 * make a note that people should be using libtool 1.4d
 * cut some of the more pointless bells and whistles out of the configure
   script in an effort to make it more maintainable
 * modularized ipc_c_tcp.c and client_crypto.o so that they're not tied
   to the curses stuff.
 * timezone/daylight and other FreeBSD fixes
 * more effort in the configure script to detect the common
   bastardizations (ahem, ports) of Berkeley DB without falling down