PECL function available for PHP 5.2 throws an error with the provided argument.
Added fallback for header_remove in PHP 5.2
Replaced version sniffing by feature check for header_remove() fallback.
Use constant defined by Symphony for PHP version check
Merge pull request #1830 from siimsoni/master

PHP 5.2 compatibility fixes
Tracking latest JIT. Closes #1822
Prevent Select Box field crashing out when linked Section is removed. Add MySQL->tableExists function. Fixes #1802
Merge branch 'integration' of github.com:symphonycms/symphony-2 into integration
Replace /e modifier in body id attribute. Closes #1832
Use a more accurate check to see if Symphony class exists in the log. Closes #1831
Release 2.3.4beta2