tree-wide: remove Emacs lines from all files This should be handled fine now by .dir-locals.el, so need to carry that stuff in every file.
machined: add early checks for unrealistically large image/pool sizes
basic: include only what we use This is a cleaned up result of running iwyu but without forward declarations on src/basic.
io-util.h: move iovec stuff from macro.h to io-util.h
util-lib: split out IO related calls to io-util.[ch]