dirname-lgpl: adjust clients that don't need full dirname

dirname-lgpl: adjust clients that don't need full dirname

Some of these modules still use xalloc_die from other paths, but
mkdir and rename are definitely reduced in complexity.

* modules/backupfile (Depends-on): Use dirname-lgpl, not dirname.
* modules/filenamecat (Depends-on): Likewise.
* modules/linkat (Depends-on): Likewise.
* modules/mkancesdirs (Depends-on): Likewise.
* modules/mkdir (Depends-on): Likewise.
* modules/openat (Depends-on): Likewise.
* modules/savewd (Depends-on): Likewise.
* modules/rename (Depends-on): Likewise.
(License): Relax license.
* modules/mkdir-tests (Depends-on): Drop progname.
(Makefile.am): Delete unneeded LDADD.
* modules/rename-tests (Depends-on, Makefile.am): Likewise.

Signed-off-by: Eric Blake <ebb9@byu.net>