With the exception of use in three quotes as well as our inlcuded copy
of the GPL, all use of the Free Software Foundation's postal address
has been removed.
Re #320.
* lib/md5.c include/md5.h: added md5 functions from GNU textutils
* include/sane/sanei_auth.h sanei/sanei_auth.c: implemented new
SANE interface for user authorization using MD5 digest