Disallow to override superglobals
Test case for #1617
Use native functions; fix #1612; fix #1348
Test case for #1480
Fix #1480
Regenerated parsers
Merge pull request #1621 from sjinks/beanstalk

[1.3.0] Beanstalk
Merge pull request #1617 from sjinks/view-superglobals

Do not allow to override superglobals in views
Merge pull request #1623 from sjinks/issue-1480

[1.3.0] Fix #1480