• update to 2.0.10-rc1
• change to MASTER_SITES local

Running tests against perl5.20/5.24 on 10.3(amd64) showed only know
issues present also on other platforms, but it seems to be a good
state for wider community roll out / test

Test failures:
t/filter/in_bbs_inject_header.t ......... 1/?

1. Failed test 22 in t/filter/in_bbs_inject_header.t at line 58 fail #6
2. Failed test 26 in t/filter/in_bbs_inject_header.t at line 58 fail #7
3. Failed test 30 in t/filter/in_bbs_inject_header.t at line 58 fail #8

t/modperl/local_env.t ....... skipped: local %ENV is still broken
t/modperl/perl_options2.t ... skipped: PerlOptions None is broken
t/perl/signals.t ............ Failed 2/2 subtests

Changelog:
2.0.10-rc1

• Automatically select the appropriate c89 option when modperl is being built with either gcc 5 or clang.
• Fix non-threaded Perl 5.22.x build and tests.
• Add support for Perl 5.22.x.