merge revision(s) 53315: [Backport #11872]
* miniinit.c (Init_enc): add some common aliases of built-in encodings. [ruby-core:72481] [Bug #11872]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@54712 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 53315: [Backport #11872]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@54712 b2dd03c8-39d4-4d8f-98ff-823fe69b080e