2014/09/01
+ add configure check for groff, needed for html/ps/pdf output.
+ update configure-script macros:
+ CF_ACVERSION_CHECK - work around another gratuitous incompatibility
introduced in 2.69
+ CF_ADD_CFLAGS - workaround for ash-shell, e.g., with Minix
+ CF_ADD_LIBS - filter out duplicates
+ CF_CURSES_FUNCS - improve workaround for weak-linkage, seems to fix
tests with NetBSD 6.1
+ CF_INTEL_COMPILER - clean up the -no-gcc option which was leftover
from testing.
+ CF_LIB_SUFFIX - change suffix for AIX shared libraries to ".so".
+ CF_MAKEFLAGS - workaround for GNU make 4.0 incompatibility with
previous releases.
+ CF_XOPEN_SOURCE - add cases for Minix, UnixWare and improve the
workaround for Solaris.
+ improve comparison in compare_cache() function, in case difference
between pointers does not fit in int's.
+ updated de.po, es.po, hu.po, lv.po from
http://translationproject.org/latest/dialog/
+ update config.guess, config.sub
097d7b2c71