pull request #918 - level teleport target "delphi"

Pull request from entrez:  treat "delphi" as a synonyn for "oracle"
when using a name rather than number for level teleport destination.

Fixes #918

src/dungeon.c

@@ -2017,6 +2017,9 @@ lev_by_name(const char *nam)
                 nam = " to Vlad's tower"; /* branch to... */
             else
                 nam = "valley";
+        } else if (!strcmpi(nam, "delphi")) {
+            /* Oracle says "welcome to Delphi" so recognize that name too */ 
+            nam = "oracle";
         }
 
         if ((slev = find_level(nam)) != 0)