Fix missing deletion of CLEAN_DIR directories

The actual deletion of directories which where added to CLEAN_DIRS by
out_of_the_way() is missing in the code:

buczek@theinternet:~/git/cmirror (fix-printf-formats)$ rm -rf /scratch/local/a
buczek@theinternet:~/git/cmirror (fix-printf-formats)$ rm -rf /scratch/local/b
buczek@theinternet:~/git/cmirror (fix-printf-formats)$ mkdir /scratch/local/a
buczek@theinternet:~/git/cmirror (fix-printf-formats)$ touch /scratch/local/a/test
buczek@theinternet:~/git/cmirror (fix-printf-formats)$ mkdir /scratch/local/b
buczek@theinternet:~/git/cmirror (fix-printf-formats)$ mkdir /scratch/local/b/test
buczek@theinternet:~/git/cmirror (fix-printf-formats)$ cmirror --delete  /scratch/local/a /scratch/local/b
theinternet.molgen.mpg.de: creating empty ./test
theinternet.molgen.mpg.de: rm -r ./test.deleteme
theinternet.molgen.mpg.de: fix directory mtime of . -> 1661234914
buczek@theinternet:~/git/cmirror (fix-printf-formats)$ find /scratch/local/b
/scratch/local/b
/scratch/local/b/test.deleteme
/scratch/local/b/test

Add call to remove directory.

cmirror.c

@@ -915,8 +915,10 @@ static void slave(char *slave_path) {
         }
         GSList *d = CLEAN_DIRS;
         while (d) {
+            char *path = (char *)d->data;
             if (!quiet)
-                warn("rm -r %s\n", (char *)d->data);
+                warn("rm -r %s\n", path);
+            fileop_rmdir_recurse(path);
             d = d->next;
         }
     }