- up to 1.21; all patches dropped (obsolete or merged); new patches from fc

- up to 1.21; all patches dropped (obsolete or merged); new patches from fc

Changed files:
    groff-DESTDIR.patch -> 1.13
    groff-ac.patch -> 1.2
    groff-bigendian.patch -> 1.2
    groff-colours.patch -> 1.4
    groff-devutf8.patch -> 1.2
    groff-do_char.patch -> 1.2
    groff-fix15.patch -> 1.2
    groff-fixminus.patch -> 1.3
    groff-gcc4.patch -> 1.3
    groff-grofferdir-auto.patch -> 1.1
    groff-grotty-wc-no-sgr.patch -> 1.1
    groff-gzext.patch -> 1.2
    groff-gzip.patch -> 1.2
    groff-info.patch -> 1.6
    groff-makefile-typo.patch -> 1.1
    groff-multibyte.patch -> 1.2
    groff-safer.patch -> 1.7
    groff-sectmp.patch -> 1.2
    groff-spacefix.patch -> 1.2
    groff.spec -> 1.91