talloc & threads in rlm_eap

[Phil Mayers]

Something's still not quite right; I can still trigger a crash with my 
local config, though it's much much harder. Symptoms look similar i.e. 
heap corruption, though I've only triggered a few so far.

:o(

Can't seem to trigger one with a default config, so maybe it's a module 
I'm using, or maybe the combo of "real" options just makes it more 
likely and I didn't wait long enough.

Will keep poking to see if I can make it more readily reproducible.