Fix #657 and postgresql problems
Added default statement for db system
Fix for #664 - Missing source url attribute in RSS feeds
fix of rss headers problem
Merge pull request #665 from mariroz/dev

fix of rss headers problem
fix of putenv warning under safe mode, issue #646
fix of already defined constant notice, issue #653
Merge pull request #667 from mariroz/dev

fix of putenv warning under safe mode, issue #646
Added save search as tag functionality
Remove unnecessary line
Clean old unused tags when deleting a tag