More fixes for bug #3418256. Copied jarsigning routine from TurboVNC in order to produce a signed applet so the system clipboard can be accessed from when used in applet mode. These changes will need some testing to make sure that there aren't any corner-cases where something breaks.

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4695 3789f03b-4d11-0410-bbf8-ca57d06f2519
8 files changed