'file://localhost/usr/bin/foo'. rip out the host and check the uri's for valid
before asking the user to send the files.

config file already existed and had a different option choosen. Added in an
'Always use OS/X default applications' option for when running on OS/X. Changed
the custom defaults to use OS/X native applications.

the idle_add wrapper for on_quit and moved the idle_add wrapping into the
sync-menu code instead.

don't fails gpg encryption when verbose is on. check in status-fd if encryption succeeded. fixes #3542