Add SSL support to DevMode.

Issue: 1806
Patch by: jat
Review by: conroy, tobyr

Review at http://gwt-code-reviews.appspot.com/1324801


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@9628 8db76d5a-ed1c-0410-87a9-c151d255dfc7