[dovecot] message order reversed on copying

Hi,

I noticed an annoying behavior of dovecot: the message order (sequence numbering) is reversed on COPYing in the maildir.

I suspect that the following code in maildir-save.c is working like "pushing".

	mf->next = ctx->files;
	...
	ctx->files = mf;

Later ctx->files is used like this.

	for (mf = ctx->files; mf != NULL; mf = mf->next) {

-- fuyuki