builtins now return success if supplied --help; use groff to build HTML man pages; reset mbstate if $'...' strings read an invalid multibyte sequence; read -t 0 now looks at other options (-n/-N/-d) and sets the terminal state appropriately

MANIFEST

@@ -735,7 +735,7 @@ support/signames.c	f
 support/siglen.c	f
 #support/bashbug.sh	f
 support/bashbug.sh.in	f
-support/man2html.c	f
+#support/man2html.c	f
 support/recho.c		f
 support/zecho.c		f
 support/xcase.c		f
@@ -863,9 +863,10 @@ examples/functions/login	f
 #examples/functions/mhfold	f
 #examples/functions/newdirstack.bsh	f
 examples/functions/notify.bash	f
+examples/functions/repeat	f
+examples/functions/repeat2	f
 #examples/functions/pathfuncs	f
 #examples/functions/recurse	f
-#examples/functions/repeat2	f
 #examples/functions/repeat3	f
 examples/functions/seq		f
 examples/functions/seq2		f