Update to the purge_directory() function.

New file types have been added to the exclusion to prevent log files
from being deleted.

issue #190

ui/nG6/lib/class.tx_nG6_utils.php

@@ -160,6 +160,7 @@ class tx_nG6_utils {
     			return 0;
     		}
     		
+    		#Exclusion of the log files from the purge process
     		$stream = ssh2_exec($connection, 'find '.$directory.' -maxdepth 1 -not -name "*.html" -not -name "*.png" -not -name "*.log" -not -name "*.log.gz" -not -name "*.pdf" -not -name "md5sum.txt" -not -name "*GXB02039*" -not -name "*PCT0078*" -type f -exec rm -f {} \;');
     		$errorStream = ssh2_fetch_stream($stream, SSH2_STREAM_STDERR);
     		// Enable blocking for both streams