weston-video-convert: start vte with a better size

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2916 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Enhance weston screencapture converters to use incrementing file names.

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2917 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
wlhost: when resetting the permissions to WAYLAND_DISPLAY, resetting the permissions to XDG_RUNTIME_DIR will disconnect all servers, unless the mask is set again for ones that have ACLS

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2918 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
wlhost: when removing permissions from all users from a Wayland server, only change permissions on XDG_RUNTIME_DIR if no other servers have other users using them

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2919 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9