* test/rinda/test_rinda.rb:  Skip IPv6 tests if no IPv6 addresses
  exist.  Skip fork-dependent test if fork is not available.
  [ruby-trunk - Bug #8159]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39922 b2dd03c8-39d4-4d8f-98ff-823fe69b080e