seems like --gpg-flags would be better off not being publically exposed, but if it's gonna be promoted, it couldn't hurt to toss in a description so the --help output makes sense. Yeah, it's pretty obvious, esp. running it, but still.
It's there as an argument, might as well document it. Added info the the args list and the man page. Should be fix in 2.7.63 or higher (fixed in cvs )