[book/security] Fix security filename typo 2.0#941

Merged

weaverryan merged 1 commit intosymfony:2.0from

hrbonz:fix_security_filename_typo_2.0

Dec 30, 2011

Commits on Dec 30, 2011

change occurences of config.[yml,xml,php] by security.[yml,xml,php] for consistency (against 2.0)
hrbonz
committed