Merge pull request #2483 from kachick/2.0-builtin_privatized_method

Builtin initialize_{dup,clone} and respond_to_missing? should be private methods as user defined from 2.0
Update comments for redefined path [ci skip]

https://github.com/rubinius/rubinius/pull/2484#pullrequestreviewcomment-5313802
Fix a spec on Kernel#remove_instance_variable for 2.0

Looks already commited to rubyspec by Shugo Maeda. Thanks!
https://github.com/rubyspec/rubyspec/commit/4c779f799551b506331f3bd198e15517f5e31b8c
Reorder Kernel by Array to use public in Kernel definition

https://github.com/rubinius/rubinius/pull/2484#pullrequestreviewcomment-5313637
Fix Kernel#remove_instance_variable for 2.0
Merge pull request #2484 from kachick/2.0-kernel-rm_ivar

Kernel#remove_instance_variable should be a public method from 2.0
Add specs for String#sub with hash second argument
Implement Hash argument handing for String#sub

Fixes some specs for gitlabhq
Add spec for method that uses a local with a call to same method
Use better check_for_locals logic

This fixes the issue where arguments would see the used local. This
ensures in those cases we always emit a call since we don't want to use
the locals then.
Add ERB tags for 1.8 mode
Add spec for Dir::Glob not recursing into symlinks
Use File::Stat.lstat in Dir::Glob to avoid recursing into symlinks
Merge pull request #2481 from leocassarani/dir-glob-symlinks

Don't follow symlinks when using Dir::Glob with recursive directories
Improve clone error message for immediates

Fixes #2486
Improve exception message for built in allocation disabled
Add specs for String#clone
Add specs for modifying dupped and cloned strings

This uses [] to make sure we slice the string and get a (if implemented)
unshared string back.
Add custom String#clone for managed shared state properly

Strings can share the underlying byte array. This makes sure we mark the
clone as shared.

Fixes #2485
Fix timeout issue

This would add requests already finished that would cause spurious
interrupts later on causing issues.