2.3 --list-keys weirdness

[Robert J. Hansen]

>> Try attaching gdb to see where it hangs.
> 
> (gdb) run
> Starting program: /usr/local/bin/gpg --list-keys
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
> [Detaching after fork from child process 41865]
> ^C

"gpgconf --kill all" solved my problem, but I'd still advise y'all to 
look into where it got wedged and why -- this was an incredibly annoying 
problem to solve, and the total lack of debugging output elevated it to 
tremendously frustrating.