fts-solr: Don't assert-crash if we couldn't connect to Solr.
fts-solr: Don't assert-crash if we couldn't connect to Solr.

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jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jwm/dovecot-notmuch