mac/mount: fix comparison bug in is_still_mounted()

The URLs that get_mount_device() and webdav_mount_url() could
differ on the trailing slash even if they were pointing to the
same resource. Since it's unpredictable what URL the OS could return
as the mount device, just normalize both URLs before comparing.

--HG--
extra : amend_source : c51cdc37944bf5474b46e8b80ac1cc77ddb16e67
mac/SFXAppDelegate: add_mount_to_favorites() should not fail mount

add_mount_to_favorites() can fail sometimes for unknown reasons
(we depend on LSSharedFileListInsertItemURL() which doesn't
have error codes or much documentation) so wrap it in a try/catch.
This isn't a critical operation so it's okay but we'll need
a way in the future to report non-critical exceptions like this.
build system: fix upx shell script syntax error in Xcode project
GNUmakefile: merge clean and clean-exe targets
GNUmakefile: accept code-signing private key from environment variable
tools: script to automate the packaging process
Added tag VERSION-1.3 for changeset 4a3047955e6d