CCAN update for 2015-09

CCAN update for 2015-09

[Rusty Russell]

Hi fellow CCANnibals!

        Some tools work this month; makes me wonder how many people have
ever read the ccanlint man page?  I think it was Lana Brindley who
promised me that writing bad documentation was a great way to get others
to fix it.  "man -l doc/ccanlint.1" in the ccan repo, or read the source:
https://github.com/rustyrussell/ccan/blob/master/doc/ccanlint.1.txt

Module of the Month: mem (CC0)
==============================

All kinds of routines which didn't make stdlib, such as simple clarity
increasers like memeq(a,alen,b,blen), memeqstr(a,alen,str) and
memoverlaps(a,alen,b,blen).  There's also memswap(a,b,len) and
mempbrkm(a,alen,b,blen) which looks for any of "b" chars in "a".
There's also the pass-through memcheck(a,alen) which checks the memory
is defined if running under valgrind.

New modules:
============
	strgrp - group/cluster similar strings. (thanks Andrew Jeffery)
        permutation - Generate permutations of arrays (thanks David Gibson)

Minor updates & bugfixes:
========================
	mem: many new routines (thanks Cody Schafer, David Gibson)


Tools updates:
=============
	configurator: enhancements to detect OpenMP (thanks Andrew Jeffery)
        _info: can now specify additional cflags (thanks Andrew Jeffery)
        ccanlint: better handling of "// given" example tests.

Cheers,
Rusty.
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