Change second argument to module in OnLoad() from sErrorMsg to sMessage.

This message is always displayed when the module returns (well, screw webadmin)
and this way a module can notify the user if it loaded but something unexpected
happened.

As you might guess, no one uses this ATM :)

Proposal comes from prozac


git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@855 726aef4b-f618-498e-8847-2d620e286838

modules/savebuff.cpp

@@ -162,7 +162,7 @@ public:
 		}
 	}
 
-	virtual bool OnLoad(const CString& sArgs, CString& sErrorMsg)
+	virtual bool OnLoad(const CString& sArgs, CString& sMessage)
 	{
 		if (!sArgs.empty())
 		{