more CCAN gems

[Harald Welte]

structeq looks like a great candidate to have type-aware memmp() of two
structures:
https://github.com/rustyrussell/ccan/tree/master/ccan/structeq

type-safe callbacks rather than 'void *' pointers:
https://github.com/rustyrussell/ccan/blob/master/ccan/typesafe_cb/_info

assert at build time:
https://github.com/rustyrussell/ccan/blob/master/ccan/build_assert/_info

fast pseudo-random generator.  Too sas that we want real random numbres
for authentication challenges in GSUP/OAP?
https://github.com/rustyrussell/ccan/blob/master/ccan/isaac/_info

-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
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