fix(imap): avoid Horde's LIST-STATUS optimization for STATUS

[ChristophWurst]

Horde has an optimization for multi STATUS calls. Here's a comparison.

An account without the LIST-STATUS capability fetches statues like this:

C: 7 STATUS INBOX (MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)
S: * STATUS INBOX (MESSAGES 4 RECENT 0 UIDNEXT 112 UIDVALIDITY 14 UNSEEN 4)
S: 7 OK STATUS completed.
>> Command 7 took 0.0458 seconds.
C: 8 STATUS Tasks (MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)
S: * STATUS Tasks (MESSAGES 0 RECENT 0 UIDNEXT 1 UIDVALIDITY 248 UNSEEN 0)
S: 8 OK STATUS completed.
>> Command 8 took 0.0444 seconds.
C: 9 STATUS "Junk Email" (MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)
S: * STATUS "Junk Email" (MESSAGES 0 RECENT 0 UIDNEXT 1 UIDVALIDITY 246 UNSEEN 0)
S: 9 OK STATUS completed.
>> Command 9 took 0.0452 seconds.
C: 10 STATUS Contacts (MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)
S: * STATUS Contacts (MESSAGES 0 RECENT 0 UIDNEXT 1 UIDVALIDITY 231 UNSEEN 0)
S: 10 OK STATUS completed.
>> Command 10 took 0.0446 seconds.
C: 11 STATUS "Sent Items" (MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)
S: * STATUS "Sent Items" (MESSAGES 2 RECENT 0 UIDNEXT 12 UIDVALIDITY 11 UNSEEN 0)
S: 11 OK STATUS completed.
>> Command 11 took 0.0446 seconds.
C: 12 STATUS "Deleted Items" (MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)
S: * STATUS "Deleted Items" (MESSAGES 0 RECENT 0 UIDNEXT 1 UIDVALIDITY 12 UNSEEN 0)
S: 12 OK STATUS completed.

✔️ works

With LIST-STATUS it will look like this:

C: 6 LIST () "" (INBOX Spam Drafts "Sent Items" Archive Trash) RETURN (STATUS (MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN))
S: 6 OK LIST completed

❌ This does not work. The statuses are empty.

By sending individual status calls we do the iteration ourselves and avoid the pitfall. Communication will look like this:

C: 6 STATUS INBOX (MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)
S: * STATUS INBOX (MESSAGES 0 RECENT 0 UIDNEXT 1 UIDVALIDITY 1762953391 UNSEEN 0)
S: 6 OK STATUS completed
>> Command 6 took 0.0184 seconds.
C: 7 STATUS Drafts (MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)
S: * STATUS Drafts (MESSAGES 0 RECENT 0 UIDNEXT 1 UIDVALIDITY 1762953280 UNSEEN 0)
S: 7 OK STATUS completed
>> Command 7 took 0.0217 seconds.
C: 8 STATUS Trash (MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)
S: * STATUS Trash (MESSAGES 0 RECENT 0 UIDNEXT 1 UIDVALIDITY 1762953280 UNSEEN 0)
S: 8 OK STATUS completed
>> Command 8 took 0.0288 seconds.
C: 9 STATUS Archive (MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)
S: * STATUS Archive (MESSAGES 0 RECENT 0 UIDNEXT 1 UIDVALIDITY 1762953280 UNSEEN 0)
S: 9 OK STATUS completed
>> Command 9 took 0.0229 seconds.
C: 10 STATUS Spam (MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)
S: * STATUS Spam (MESSAGES 0 RECENT 0 UIDNEXT 1 UIDVALIDITY 1762953280 UNSEEN 0)
S: 10 OK STATUS completed
>> Command 10 took 0.0215 seconds.
C: 11 STATUS "Sent Items" (MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)
S: * STATUS "Sent Items" (MESSAGES 0 RECENT 0 UIDNEXT 1 UIDVALIDITY 1762953280 UNSEEN 0)
S: 11 OK STATUS completed

[ChristophWurst]

/backport to stable5.5