- Stop calling autoconf, this was no longer necessarry and in current
        rawhide breaks us from building (because aclocal.m4 does not match the
        new autoconf version)
    - Drop our last 2 patches, they were modifying configure, but since we
        called autoconf after that in effect they were not doing anything,
        review has confirmed that they indeed are no longer needed)
    - Drop using system libtool hack, this is dangerous when the libtool used
        to generate ./configure and the one used differ
    - Remove various antique checks (for example check if RPM_BUILD_ROOT == /)
    - Drop unnecessary explicit library Requires
    - Cleanup BuildRequires