Update to upstream version '0.23.0+ds'
with Debian dir d6b5c17d14ac35a0c7a5d7e9ab39e151ef46370e

Upcoming upload of htslib 1.20 comes with improvements causing a test
failure in pysam.  This change anticipates the correction without
introduction of regressions with existing releases of htslib.

Thanks: John Marshall

This file set symbolic links up to help with Python 2.7, which is
obsolete and should not be used anymore, so these links are not useful
anymore.

Update to upstream version '0.22.1+ds'
with Debian dir 2ee2db91e5d45c01ef09c42c6e401fa04adb59ca

Update to upstream version '0.22.0+ds'
with Debian dir 36d5c28baf2be2d1426cabd3e9cd67d92768a431