Bugfixes in directory code:

Improve debugging output on fingerprint checking.

Make sure to add our own fingerprint to the fingerprint list _before_
adding our own descriptor, or else we'll reject ourself.

Don't call a directory invalid just because we have a newer descriptor
for some router.

Use router_get_dir_hash to generate hashes for signed directories.

Make sure we add our own descriptor successfully.

Don't fall-through on failed base64-endode.


svn:r514