Log Message:
news/leafnode: Update to 1.12.0

- Moved pkgsrc options into separate file options.mk
- Modified pkgsrc patch to cover whole rule body again
- Removed WRKSRC setting (was explicitly set to default value)
- Replaced MESSAGE by ${PREFIX}/share/doc/leafnode/INSTALL.pkgsrc

==============================================================================
* 1.12.0, 2022-05-26

### CHANGES
- leafnode now requires the PCRE2 library instead of PCRE.
  PCRE2 has been around for a few years and is maintained,
  while PCRE is end of life, no longer supported,
  and is being phased out by distributions.
  See its home page, https://github.com/PhilipHazel/pcre2
  Fixes Debian Bug#1000110 reported by Matthew Vernon via Moritz Mühlenhoff.
- Documentation for running under daemontools/ucspi-tcp (tcpserver)
  has been removed, only UNINSTALL-daemontools remains as documentation.
- leafnode 1 is now distributed in gzip and xz formats.
  bzip2 will no longer be used because xz performs better overall.
- All files have been converted from ISO-8859-1 to UTF-8 encoding.
- Added leafnode@.service and leafnode.socket as examples for how to launch
  the network-based leafnode listening on port 119.