fts-solr: Avoid sending too large queries to Solr due to listing wanted mailboxes. This is mainly a problem if there are a lot of mailboxes and "All Mails" virtual mailbox. For now hardcoded to send max 10 mailboxes in the query, afterwards it just returns matches in all the mailboxes and we'll filter out the unwanted mailboxes.
fts-solr: Avoid sending too large queries to Solr due to listing wanted mailboxes.
This is mainly a problem if there are a lot of mailboxes and "All Mails"
virtual mailbox. For now hardcoded to send max 10 mailboxes in the query,
afterwards it just returns matches in all the mailboxes and we'll filter out
the unwanted mailboxes.

dscho/dovecot,dscho/dovecot,dscho/dovecot,dscho/dovecot,dscho/dovecot