Fix so fallback from BINARY to BODY FETCH is used also on [PARSE] errors in dovecot 2.3 (#6383)

CHANGELOG

@@ -91,6 +91,7 @@ CHANGELOG Roundcube Webmail
 - Fix so links over images are not removed in plain text signatures converted from HTML (#4473)
 - Fix various issues when downloading files with names containing non-ascii chars, use RFC 2231 (#5772)
 - Fix PHP warnings on dummy QUOTA responses in Courier-IMAP 4.17.1 (#6374)
+- Fix so fallback from BINARY to BODY FETCH is used also on [PARSE] errors in dovecot 2.3 (#6383)
 
 RELEASE 1.3.7
 -------------

program/lib/Roundcube/rcube_imap_generic.php

@@ -2822,7 +2822,7 @@ class rcube_imap_generic
             }
 
             // handle UNKNOWN-CTE response - RFC 3516, try again with standard BODY request
-            if ($binary && !$found && preg_match('/^' . $key . ' NO \[UNKNOWN-CTE\]/i', $line)) {
+            if ($binary && !$found && preg_match('/^' . $key . ' NO \[(UNKNOWN-CTE|PARSE)\]/i', $line)) {
                 $binary = $initiated = false;
                 continue;
             }