make const and volatile-qualified callbacks actually work.
[ccan] / ccan / read_write_all /
2008-11-14 Rusty RussellFix run-read_all and fix hang if they should fail.
2008-11-14 Rusty RussellTests for read_write_all.
2008-11-14 Rusty RussellFix new glibc warnings about warn_unused_result.