common: Prepare for parsing mail sub-addresses.

* common/mbox-util.c (mailbox_from_userid): Add arg subaddress and
implement.  Change all callers to pass false for it.

* common/t-mbox-util.c (run_mbox_no_sub_test): New.
(run_filter): Add arg no_sub.
(main): Call new test and add option --no-sub.
--

Some stats: In the about 5300000 keys on the SKS servers we found 3055
unique mailboxes with a '+' in it.  After removing leading and
trailing '+' as well as multiple '+' (e.g. "c++" or "foo+bar+baz")
2697 were left which seem to be valid sub-addresses.

To filter mailboxes out from a line delimited list with
user-ids (e.g. an SQL output), the command

   t-mbox-util --verbose --filter

can be used; to output w/o sub-addresses add --no-sub.

GnuPG-bug-id: 4200
Signed-off-by: Werner Koch <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/common/mbox-util.h b/common/mbox-util.h
index 7355ceef5..10ff2c4a0 100644
--- a/common/mbox-util.h
+++ b/common/mbox-util.h
@@ -22,7 +22,7 @@
 int has_invalid_email_chars (const void *buffer, size_t length);
 int is_valid_mailbox (const char *name);
 int is_valid_mailbox_mem (const void *buffer, size_t length);
-char *mailbox_from_userid (const char *userid);
+char *mailbox_from_userid (const char *userid, int subaddress);
 int is_valid_user_id (const char *uid);
 int is_valid_domain_name (const char *string);