configure: fix --collectsdir and --appsdir handling

Thanks to @tgbugs for the report an initial repair.

Closes #3692

racket/src/ac/make-configure

@@ -50,8 +50,9 @@ exit 0
 	 runstatedir
 	 infodir
          htmldir
-         ;; dvidir - converted to "collectsdir"
-         ;; pdfdir - converted to "appsdir"
+         ;; Note: any arguments converted this way need to be excluded in "rktio_keep.m4"
+         ;;  dvidir - converted to "collectsdir"
+         ;;  pdfdir - converted to "appsdir"
          psdir
          localedir)))
 

racket/src/ac/rktio_keep.m4

@@ -7,7 +7,7 @@ for fixup_arg
 do
   case $fixup_arg in
   # Strip away all feature choices
-  -enable* | --enable* | -disable* | --disable*)
+  -enable* | --enable* | -disable* | --disable* | -collects* | --collects* | -apps* | --apps*)
     ;;
   *)
     case $fixup_arg in

racket/src/bc/configure

@@ -7283,7 +7283,7 @@ for fixup_arg
 do
   case $fixup_arg in
   # Strip away all feature choices
-  -enable* | --enable* | -disable* | --disable*)
+  -enable* | --enable* | -disable* | --disable* | -collects* | --collects* | -apps* | --apps*)
     ;;
   *)
     case $fixup_arg in

racket/src/cs/c/configure

@@ -5643,7 +5643,7 @@ for fixup_arg
 do
   case $fixup_arg in
   # Strip away all feature choices
-  -enable* | --enable* | -disable* | --disable*)
+  -enable* | --enable* | -disable* | --disable* | -collects* | --collects* | -apps* | --apps*)
     ;;
   *)
     case $fixup_arg in