Log Message:
Fix a segfault on NetBSD/amd64 (at least):

 - Include standard headers (stdlib.h, string.h, stdio.h) in misc.h to
   avoid conflicts with built-in declarations of functions.
 - Change CFLAGS= in Makefile to CFLAGS+= to use pkgsrc-provided CFLAGS.
 - Include termcap.buildlink3.mk to handle termcap properly.
 - Add DESTDIR support, use AUTO_MKDIRS.
 - Bump PKGREVISION.

 Now I can actually use it! ;)