Fix DIGEST-MD5 auth

Fix DIGEST-MD5 auth (make sure we're not splitting on BASE64 `==')

Fix RFC 6122 implementation

Update/improve German translations

Retab JID file

JID resourceparts should be able to contain "@" and "/" characters

Update spanish translations

Updated Czech translation file

added missing strings
fixing typos, improvements for better understanding

Update Italian translations

Warning "fixes"

Update basque translation