Moved RsWithCookie.extend() content back to head() as requested by @carlosmiranda.
Moved RsWithCookie.extend() content back to head() as requested by @carlosmiranda.

I also removed a useless double name and value parameters check I self-added earlier.

For #293

bdragan/takes,Bertram25/takes,Bertram25/takes,RamIndani/takes,georgeyanev/takes,essobedo/takes,pecko/takes,mstzn36/takes,hs3180/takes,pecko/takes,RamIndani/takes,xupyprmv/takes,simonjenga/takes,bdragan/takes,xupyprmv/takes,ikhvostenkov/takes,antonini/takes,erimerturk/takes,erimerturk/takes,antonini/takes,ikhvostenkov/takes,mstzn36/takes,yegor256/takes,simonjenga/takes,hs3180/takes,essobedo/takes,dalifreire/takes,yegor256/takes,georgeyanev/takes,dalifreire/takes