Removed synchronized services from Symfony 2.7 docs#5169

Merged

weaverryan merged 3 commits intosymfony:2.7from

javiereguiluz:fix_5140

May 23, 2015

Commits on Apr 13, 2015

Removed synchronized services from Symfony 2.7 docs
javiereguiluz
committed
Reworded he notice about deprecation of synchronized services
javiereguiluz
committed

Commits on May 23, 2015

Added a label to maintain the old URL
javiereguiluz
committed