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author	Rusty Russell <rusty@rustcorp.com.au>
	Tue, 5 Oct 2010 12:03:56 +0000 (22:33 +1030)
committer	Rusty Russell <rusty@rustcorp.com.au>
	Tue, 5 Oct 2010 12:03:56 +0000 (22:33 +1030)
commit	be6a5cdadeef4995cc935f2d2443f45f542ed125
tree	55c58b4f67f3d5db8aea61c3a6a73947eb9a94ad	tree \| snapshot (tar.gz zip)
parent	f4b1f445a7b21b1599530afb897ef54efe15479d	commit \| diff

opt: minor API tweaks.

Don't allow NULL descs, and put them in macro. Users can use "", but make
sure it's explicit, not an accidental omission.
Use errx() instead of assert() for API usage errors.
Rename opt_flags to opt_type.

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ccan/opt/opt.c		diff \| blob \| history
ccan/opt/opt.h		diff \| blob \| history
ccan/opt/test/run-correct-reporting.c		diff \| blob \| history
ccan/opt/test/run-helpers.c		diff \| blob \| history
ccan/opt/test/run.c		diff \| blob \| history
ccan/opt/test/utils.c		diff \| blob \| history
ccan/opt/usage.c		diff \| blob \| history