We were not able to handle ~/... type of path configurations and we
crashed with mysterious SSL errors when no file was found at the
configured location. Expand '~' and bomb out with usable error messages
in case such a file does not exist. This will still not protect against
corrupt cacert files but it goes a long way towards user friendliness.
Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>