fix webserver.pp to also accept ssl => true as a boolean,
instead of a string so you don't have to quote it without
breaking puppet

was:

sigh, quote 'true' because webserver.pp does treat them as strings

..maybe this should be fixed in webserver.pp:

if $ssl in ["true", "only", "redirected"] {

because if you don't (like you should) you get:

'true' from left operand of 'in' expression is not a string
at /etc/puppet/manifests/webserver.pp:296

Change-Id: Id4977d0bee57dd3a57dcbfb4edd87af0049e25b1