Re: mailinfo: don't require "text" mime type for attachments

> This code goes all the way back to March of 2007, in commit 87ab79923463 
> ("builtin-mailinfo.c infrastrcture changes"), and apparently Don used to 
> pass random mbox contents to git. However, the pre-decode vs post-decode 
> logic really shouldn't matter even for that case, and more importantly, "I 
> fed git am crap" is not a valid reason to break *real* patch attachments.
> 
> If somebody really cares, and determines that some attachment is binary 
> data (by looking at the data, not the MIME-type), the whole attachment 
> should be dismissed, rather than fed in random-sized chunks to 
> "handle_filter()".