We need a longer document to inform users of caveats
related to Signal.trap usage. This is still incomplete,
and we can fill in and edit other bits as needed.
* doc/signals.rdoc: new document
[ruby-core:85107] [Misc #14222]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62083 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
