Other (minor) changes are listed below:
* Update additional patches also.
* Add new perl module dependency which POPFile newly 'use'ed.
* Add new runtime dependency option, WITH_POPFILE_UPGRADE_FROM_0_20.
If you're using previous version of POPFile, you may want to make
this port with WITH_POPFILE_UPGRADE_FROM_0_20=YES.
* Display compile-time option introduction.
* Introduce popfile.sh, per-user bases startup script. Since v0.21.0
supports multi-user, you don't have to have your _own_ copy of POPFile.
setup-popfile.sh is also removed; it doesn't need anymore.
202756df9a