autopickup_exceptions enhancement

An enhancement to the original to allow
two types of exceptions:
      always pickup
      never pickup

To specify "never pickup", begin the pattern string with '>'
which is NetHack's down direction symbol (for "leave it down")

To specify "always pickup", begin the pattern string with '<'
which is NetHack's up direction symbol.

For example, to pick up all arrows, regardless of the pickup_
types setting:
autopickup_exception = "<*arrows"

include/decl.h

@@ -372,10 +372,11 @@ E char *fqn_prefix_names[PREFIX_COUNT];
 #ifdef AUTOPICKUP_EXCEPTIONS
 struct autopickup_exception {
 	char *pattern;
+	boolean grab;
 	struct autopickup_exception *next;
 };
-
 #endif /* AUTOPICKUP_EXCEPTIONS */
+
 #undef E
 
 #endif /* DECL_H */