+ add --enable-interop to sample package scripts (suggested by Juergen
Pfeifer).
+ update CF_PATH_SYNTAX macro, from mawk changes.
+ modify mk-0th.awk to allow for generating llib-ltic, etc., though
some work is needed on cproto to work with lib_gen.c to update
llib-lncurses.
+ remove redundant getenv() cal in database-iterator leftover from
cleanup in 20120622 changes (report by Sven Joachim).
+ modify configure macro CF_XOPEN_SOURCE, etc., to use CF_ADD_CFLAGS
consistently to add new -D's while removing duplicates.
+ modify a few configure macros to consistently put new options
before older in the list.
+ add tiparm(), based on review of X/Open Curses Issue 7.
+ minor documentation cleanup.
+ update config.guess, config.sub from
http://savannah.gnu.org/projects/config
(caveat - its maintainer put 2010 copyright date on files dated 2009)
