Desc: Add obj_desc_short()

Same as obj_desc() but use the short version and do not include the
location information by default. New method instead of bool parameters
for readability.

src/Desc.cc

@@ -432,4 +432,15 @@ std::string obj_desc(const Obj* o)
 	return std::string(d.Description());
 	}
 
+std::string obj_desc_short(const Obj* o)
+	{
+	static ODesc d;
+
+	d.SetShort(true);
+	d.Clear();
+	o->Describe(&d);
+
+	return std::string(d.Description());
+	}
+
 	} // namespace zeek

src/Desc.h

@@ -230,6 +230,9 @@ protected:
 // IntrusivePtr because the latter is harder to deal with when making
 // calls from a debugger like lldb, which is the main use of this function.
 class Obj;
-extern std::string obj_desc(const Obj* o);
+std::string obj_desc(const Obj* o);
+
+// Same as obj_desc(), but ensure it is short and don't include location info.
+std::string obj_desc_short(const Obj* o);
 
 	} // namespace zeek