here is the trivial patch. -e is still a no-op but it will accept arguments
--- 2016.73.old/cli-runopts.c 2016-03-18 15:44:43.000000000 +0100 +++ 2016.73.new/cli-runopts.c 2016-05-13 18:55:00.000000000 +0100 @@ -297,7 +297,6 @@ break; #endif case 'F': - case 'e': #ifndef ENABLE_USER_ALGO_LIST case 'c': case 'm': @@ -313,6 +312,7 @@ print_version(); exit(EXIT_SUCCESS); break; + case 'e': case 'b': next = &dummy; /* FALLTHROUGH */