Added my attempt at an Intermediate level Debugger Usage Guide to the help document, and fixed a small issue with 'Forbid' breakpoints where even if they were disabled, they would still have the same effect as when enabled. These can now be turned off without deleting them.

src/debug.cpp

@@ -469,7 +469,7 @@ void BreakHit(bool force = false) {
 		//check to see whether we fall in any forbid zone
 		for (int i = 0; i < numWPs; i++) {
 			watchpointinfo& wp = watchpoint[i];
-			if(!(wp.flags & WP_F))
+			if(!(wp.flags & WP_F) || !(wp.flags & WP_E))
 				continue;
 
 			if (condition(&wp))