merge revision(s) 67183: [Backport #15607]
Fix PTY.open on OpenBSD [Bug #15607] From: Jeremy Evans <code@jeremyevans.net>
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67186 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 67183: [Backport #15607]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67186 b2dd03c8-39d4-4d8f-98ff-823fe69b080e