Clarify interactive shells message
diff --git a/src/main/java/com/gitblit/transport/ssh/WelcomeShell.java b/src/main/java/com/gitblit/transport/ssh/WelcomeShell.java
index 4341a3e..acd3c15 100644
--- a/src/main/java/com/gitblit/transport/ssh/WelcomeShell.java
+++ b/src/main/java/com/gitblit/transport/ssh/WelcomeShell.java
@@ -134,7 +134,7 @@
 			msg.append(user.getDisplayName());
 			msg.append(", you have successfully connected over SSH.");
 			msg.append(nl);
-			msg.append(" Interactive shells are disabled.");
+			msg.append(" Interactive shells are not available.");
 			msg.append(nl);
 			msg.append(nl);
 			msg.append("   client:   ");