tdeio/kdirlister: add some cleanups for LocalURLJob's

Theoretically the lack of those could lead to segfaults and data
corruptions, hard to debug but very rare.

Signed-off-by: Alexander Golubev <fatzer2@gmail.com>
(cherry picked from commit f34601e77a)

tdeio/tdeio/kdirlister.cpp

@@ -1998,6 +1998,11 @@ void KDirLister::stop()
 {
   kdDebug(7003) << k_funcinfo << endl;
   s_pCache->stop( this );
+  for( auto it = d->openURLContext.begin(); it != d->openURLContext.end(); ++it ) {
+    it.key()->disconnect( this );
+    it.key()->kill();
+  }
+  d->openURLContext.clear();
   d->m_referenceURLMap.clear();
 }
 
@@ -2005,6 +2010,17 @@ void KDirLister::stop( const KURL& _url )
 {
   kdDebug(7003) << k_funcinfo << _url.prettyURL() << endl;
   s_pCache->stop( this, _url );
+  TQPtrList<TDEIO::Job> toRemove;
+  for( auto it = d->openURLContext.begin(); it != d->openURLContext.end(); ++it ) {
+    if( it.data().url ==_url ) {
+      it.key()->disconnect( this );
+      it.key()->kill();
+      toRemove.append(it.key());
+    }
+  }
+  for(const auto &job: toRemove) {
+    d->openURLContext.remove(job);
+  }
   d->m_referenceURLMap.remove(_url.url());
 }