Fix parsing dot-staffed lines in multiline text (#5838)

CHANGELOG

@@ -4,6 +4,7 @@ CHANGELOG Roundcube Webmail
 - Fix rewind(): stream does not support seeking (#5950)
 - Fix bug where HTML messages could have been rendered empty on some systems (#5957)
 - Fix (again) bug where image data URIs in css style were treated as evil/remote in mail preview (#5580)
+- Managesieve: Fix parsing dot-staffed lines in multiline text (#5838, #5959)
 
 RELEASE 1.2.6
 -------------

plugins/managesieve/Changelog

@@ -1,3 +1,4 @@
+- Fix parsing dot-staffed lines in multiline text (#5838)
 - Fix handling of scripts with nested rules (#5540)
 - Fix possible defect in handling \r\n in scripts (#5685)
 

plugins/managesieve/lib/Roundcube/rcube_sieve_script.php

@@ -1231,11 +1231,13 @@ class rcube_sieve_script
                             $text    .= substr($str, $position, $pos - $position);
                             $position = $pos + 2;
 
-                            if ($str[$pos] == "\n"
+                            if ($str[$position] == "\n"
-                                || ($str[$pos] == "\r" && $str[$pos + 1] == "\n")
+                                || ($str[$position] == "\r" && $str[$position + 1] == "\n")
                             ) {
                                 break;
                             }
+
+                            $text .= "\n.";
                         }
 
                         // remove dot-stuffing

plugins/managesieve/tests/src/parser_vacation

@@ -5,6 +5,8 @@ if header :contains "Subject" "vacation"
 	vacation :days 1 text:
 # test
 test test /* test */
+..
+..test
 test
 .
 ;