Screen name allow - next to letters and numbers

screen_init.sh

@@ -84,8 +84,8 @@ do
 			echo "[!] No screen name set";
 			exit;
 		fi;
-		if [[ ! $SCREEN_NAME =~ ^[A-Za-z0-9]+$ ]]; then
-			echo "[!] Screen name must be alphanumeric: ${SCREEN_NAME}";
+		if [[ ! $SCREEN_NAME =~ ^[A-Za-z0-9-]+$ ]]; then
+			echo "[!] Screen name must be alphanumeric (letters, numbers, and hyphens only): ${SCREEN_NAME}";
 			exit;
 		fi;
 		# check that we do not create double entries