In future versions of Psych, the `load` method will be mostly the same
as the `safe_load` method. In other words, the `load` method won't
allow arbitrary object deserialization (which can be used to escalate to
an RCE). People that need to load *trusted* documents can use the
`unsafe_load` method.
This commit introduces the `unsafe_load` method so that people can
incrementally upgrade. For example, if they try to upgrade to 4.0.0 and
something breaks, they can downgrade, audit callsites, change to
`safe_load` or `unsafe_load` as required, and then upgrade to 4.0.0
smoothly.
https://github.com/ruby/psych/commit/cb50aa8d3f
* Added deprecated warnings for the new interface of keyword argument.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65193 b2dd03c8-39d4-4d8f-98ff-823fe69b080e