tmpdir.rb: permission of user given directory * lib/tmpdir.rb (Dir.mktmpdir): check if the permission of the parent directory only when using the default temporary directory, and no check against user given directory. the security is the user's responsibility in that case. [ruby-core:91216] [Bug #15555]
merge revision(s) 66909: [Backport #15555]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@67148 b2dd03c8-39d4-4d8f-98ff-823fe69b080e