c-ares version 1.22.1

This is a bugfix release.

Bug Fixes:
 o Fix /etc/hosts processing performance with all entries using same IP
   address. Large hosts files using the same IP address for all entries
   could use exponential time. [1]
 o Fix typos in manpages [2]
 o Fix OpenWatcom building [3]

Thanks go to these friendly people for their efforts and contributions:
  Brad House (@bradh352)
  Daniel Stenberg (@bagder)
  Douglas R. Reno (@renodr)
  Gregor Jasny (@gjasny)
(4 contributors)

References to bug reports and discussions on issues:
 [1] = https://github.com/c-ares/c-ares/commit/a36317
 [2] = https://github.com/c-ares/c-ares/pull/619
 [3] = https://github.com/c-ares/c-ares/pull/623