Ark: Fixed support for rar files. This relates to bug 2794.

Special thanks to Ray Vine <ray-v@inbox.lv> whose patch inspired this one.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit 04a8b70fba)

ark/rar.cpp

@@ -99,7 +99,7 @@ bool RarArch::processLine( const TQCString &line )
   // Look for rar/unrar version first
   if (!m_version)
   {
-    TQRegExp versionRegExp (TQString::fromLatin1 ("RAR\\s(\\d+)\\.(\\d+)\\s(beta (\\d+))?\\s+Copyright.*"));
+    TQRegExp versionRegExp (TQString::fromLatin1 ("(?:UN)?RAR\\s+(\\d+)\\.(\\d+)(\\s+beta\\s+(\\d+))?\\s.*Copyright.*"));
 
     if (versionRegExp.exactMatch (uline))
     {