Update bugs.md and 1995/cdua/README.md

I noted in bugs.md that there is a bug that remains and I noted the bug
in the README.md too (under the to run section) as it seems like it
should be noted (sometimes the program needs you to press return to
continue solving the maze).

bugs.md

@@ -20,6 +20,17 @@ you have one if you like).
 
 ## Known bugs that are OK to fix
 
+### [1995/cdua](1995/cdua/cdua.c) ([README.md](1995/cdua/README.md))
+
+This did not compile under macOS and after it did it crashed.
+[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) fixed this but he
+observed that sometimes the program asks the user to hit return a second time to
+resume solving the maze. It does not always happen. It doesn't seem to be
+related to making it work under macOS as all that did was removing some invalid
+prototypes and use `printf()` instead of the invalid pointer to it (incompatible
+type).
+
+
 ### [2014/vik](2014/vik/prog.c) ([README.md](2014/vik/README.md))
 
 [Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) discovered a bug that