Manual page: Document --create-schema-base, --create-schema-index
TODO: Extract major/minor version from class files
symboldb: Fix exit status of --load-rpm
cxxll::rpm_parser_state: Compute correct hard link counts

Some RPMs have link counts in the header which do not include ghost
files.  This means that do not treat the final file in a hard-linked
group as the content-providing file during payload parsing, unless
we exclude ghost files from the hard link count, which this patch
implements.