imap-dl: Use "gssapi" as a synonym for "kerberos"

Robbie Harwood says that "gssapi" is more accurate.

I regularly get perplexed by the layers of SASL, GSSAPI, and Kerberos,
so i'm happy to have this alias Just Work in any case.

Suggested-by: Robbie Harwood <rharwood@redhat.com>
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/imap-dl b/imap-dl
index c98f575..5a8494c 100755
--- a/imap-dl
+++ b/imap-dl
@@ -193,14 +193,14 @@ def scan_msgs(configfile:str, verbose:bool) -> None:
         # installed and the user has a reasonable identity in their
         # local credential cache, choose kerberos, otherwise, choose
         # "basic".
-        if authentication == 'kerberos':
+        if authentication in ['kerberos', 'gssapi']:
             auth_gssapi(username, imap, conf, server)
         elif authentication == 'basic':
             auth_builtin(username, imap, conf, server)
         else:
             # FIXME: implement other authentication mechanisms
             raise Exception(f'retriever.authentication should be one of:\n'
-                            '"basic" or "kerberos", got "{authentication}"')
+                            '"basic" or "gssapi" (or "kerberos"). Got "{authentication}"')
 
         if verbose: # only enable debugging after login to avoid leaking credentials in the log
             imap.debug = 4