Remove expired ports:

2020-09-15 audio/abraca: Uses deprecated version of python
2020-09-15 audio/ardour5: Uses deprecated version of python
2020-09-15 audio/cplay: Uses deprecated version of python
2020-09-15 audio/cpp-xmms2: Uses deprecated version of python
2020-09-15 audio/p5-xmms2: Uses deprecated version of python
2020-09-15 biology/haplohseq: Uses deprecated version of python
2020-09-15 biology/tophat: Uses deprecated version of python
2020-09-15 chinese/ibus-array: Uses deprecated version of python
2020-09-15 comms/congruity: Uses deprecated version of python
2020-09-15 comms/libbtbb: Uses deprecated version of python
2020-09-15 comms/quisk: Uses deprecated version of python
2020-09-15 databases/mtools-mongodb: Uses deprecated version of python
2020-09-15 databases/mydbf2mysql: Uses deprecated version of python

Deprecate some ports using deprecated version of python

With hat:	portmgr

net/fb: update to 2.0.4

PR:		235595
Submitted by:	Greg Fitzgerald <gregf@hugops.pw> (maintainer)

- Add explicit FLAVOR to a few dependencies
- Remove FLAVOR from py-docutils dependency in comms/uhd, in this case
  it needs the rst2html command, not the docutils module
- Mark some ports as not compatible with python3

Add new port: net/fb - client for paste.xinu.at

PR:		211374
Submitted by:	Greg Fitzgerald <gregf@hugops.pw>
Reviewed by:	matthew
Approved by:	matthew (mentor)
Differential Revision:	https://reviews.freebsd.org/D9231