Changes for version 0.39
- use SIGTERM instead of SIGHUP to kill lazy SSH master
- on 1_run.t remote commands could be aliased bug (report and patch by Danijel Tasov)
- add methods for external master PID handling
- add 'all' tag to Net::OpenSSH::Constants
- check SSH client version from Makefile.PL
- work around L<Foo::Bar> links in POD being rendered as "the Foo::Bar manpage" by some POD backends.