shachain: allow overriding of number of bits, add cmdline tool.2016-12-05T05:48:20ZRusty Russellrusty@rustcorp.com.auRusty Russellrusty@rustcorp.com.au2016-12-05T05:48:20Zhttp://git.ozlabs.org/?p=ccan;a=commitdiff;h=4bb69fe6d568f84bd682cf6f86bae168313deb91
shachain: allow overriding of number of bits, add cmdline tool.
lightning uses 48 bits, so this provides a quick utility for our test
vectors, and provides a nice example.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>