* Fix autoload in the presence of canonicalized paths
* Fix require locking in the presence of canonicalized paths
* Fix circular require warning setting $!

This should help bring popen behavior in line with MRI per
rails/rails#19777.

* @coremethod with "private" names are now automatically private.
* At last, proper implementation of Module.{public_,private_,protected_,}methods.

…nodes.

* They are generated by the DSL anyway and likely remnants when they were not yet DSL nodes.
* execute() is the same when generated, with just an extra try/catch.
* Keep the execute with evaluated values above specializations for consistency.

* Peel off leading env hash
* Peel off options
* Process coercions correctly

Helps get the case from rails/rails#19777 running right.

…ia '-r' switch.

The original problem was that we only searched the target module's
method table, which is empty in the presence of prepends. The new
issue was that my depth-limiting fix to IncludedModuleWrapper's
searchMethodCommon did not start from the right place (`this`
instead of `origin`) and the condition was not right.

* Looks like we can have scenarios where 'self' for a closure
  executed in a module_eval context need not be the module
  but a different object. In that case, we still need to add
  the method to self => we need to get its metaclass first.

* This fixes crasher in this case:

-------------
require "minitest/autorun"

describe "A" do
  it "should do something" do
    def foo
    end
  end
end
-------------

* We should rip out the fix when we update the define_method
  implementation to convert those blocks to real method scopes.

This reverts commit e7c7beb.

[skip ci]

Conflicts:
	core/src/main/java/org/jruby/RubyIO.java
	core/src/main/java/org/jruby/runtime/ThreadContext.java
	core/src/main/java/org/jruby/runtime/load/LoadService.java
	core/src/main/java/org/jruby/util/TypeConverter.java
	lib/pom.rb

* Remove old unused options.

Conflicts:
	truffle/src/main/java/org/jruby/truffle/translator/BodyTranslator.java