Merge, with a little fix of s/not//

diff --cc dak/process_unchecked.py
index 82133068be56c33fb4d4b96b6908467eaafb14b5,6e62c431284b95790fe7f22b53fca747a5710b0e..055f7ee85b84d1d04e02dd6f905a64734818fe13
--- 1/dak/process_unchecked.py
--- 2/dak/process_unchecked.py
+++ b/dak/process_unchecked.py
@@@ -1072,7 -1072,8 +1072,8 @@@ def check_signed_by_key()
          if uid_name == "": sponsored = 1
      else:
          sponsored = 1
-         if daklib.utils.is_email_alias(uid_email):
 -        if ("source" not in changes["architecture"] and
++        if ("source" in changes["architecture"] and
+             daklib.utils.is_email_alias(uid_email)):
              sponsor_addresses = daklib.utils.gpg_get_key_addresses(changes["fingerprint"])
              if (changes["maintaineremail"] not in sponsor_addresses and
                  changes["changedbyemail"] not in sponsor_addresses):