Log Message:
1.6.12
        * bugfix #413: Fix manpage source for srcdir != builddir
        * Canonicalize the signers name rdata field in RRSIGs when signing
        * Ignore minor version of Private-key-format (so v1.3 may be used)
        * Allow a check_time to be given in stead of always checking against
          the current time. With ldns-verify-zone the check_time can be set
          with the -t option.
        * Added functions for updating and manipulating SOA serial numbers.
          ldns-read-zone has an option -S for updating and manipulating the
          serial numbers.
        * The library Makefile is now GNU and BSD make compatible.
        * bugfix #419: NSEC3 validation of a name covered by a wildcard with
          no data.
        * Two new options (--with-drill and --with-examples) to the main
          configure script (in the root of the source tree) to build drill
          and examples too.
        * Fix days_since_epoch to year_yday calculation on 32bits systems.