Added docs about immutable dispatcher
Documented htmlPattern option
Unified autoloading
gc_maxlifetime default value

The correct value of parameter gc_maxlifetime is not 14400 but 1440.
Merge pull request #2880 from petajaros/patch-1

gc_maxlifetime default value
Merge pull request #2863 from WouterJ/issue_2858

Added docs about immutable dispatcher
[#2863] Fixing some ordering of documents
Merge pull request #2864 from WouterJ/issue_2833

Documented htmlPattern option
[#2864] Small tweaks thanks to @xabbuh on new Regex:htmlPattern option docs
Merge pull request #2867 from WouterJ/issue_2331

Unified autoloading in Sf2 <> Sf1 article
[#2867] Minor tweaks
Merge branch '2.1' into 2.2

Conflicts:
	components/event_dispatcher/introduction.rst
	cookbook/symfony1.rst