Backport fix for #2508 into 2.2-stable

This is pointless because it will never be released, but people won't stop complaining.
Fix Common::get_config() error in PHP 5.6 - fix #3302

fix #3302

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Merge pull request #3303 from rogeriopradoj/fix-3302

Fix Common::get_config() error in PHP 5.6 - fix #3302
Fix #3314
Update Changelog.html

Missing quote on the end of the anchor for the bug fix #2508
Merge pull request #3348 from champ2959/patch-1

Update Changelog.html
Fix #3309
Close #3404 | Improve mysqli's escape_str()
Fix broken forum and wiki links in user guide