do not fail in read-only mode when openssl is missing, fix #2221
separate updating certificates in homebrew for jruby, update #2123, update #2221
separate updating certificates in macports for jruby, update #2123, update #2221
separate updating certificates in fink for jruby, update #2123, update #2221
separate updating certificates in smf for jruby, update #2123, update #2221