- fix array out of bounds accesses and cleanup couple of other alloca()
        calls.
    - Undo mistake in copy order for submount path introduced by rev 11 patch.
    - add check for alternate libxml2 library for libxml2 tsd workaround.
    - add check for alternate libtirpc library for libtirpc tsd workaround.
    - cleanup configure defines for libtirpc.
    - add WITH_LIBTIRPC to -V status report.
    - add libtirpc-devel to BuildRequires.
    - add nfs mount protocol default configuration option.