Revert un-quoting of booleans in webserver.pp

Originally changed in:
https://gerrit.wikimedia.org/r/#/c/142479/8/manifests/webserver.pp

This may have caused unexpected behavior

Change-Id: Ia7a30414427976c81916bd6ee94a412c7d6e3ca2
Merge "Revert un-quoting of booleans in webserver.pp" into production