Updated copyright notices to include the year 2018.
lib: iostream-proxy - Specify what failed in completion callback parameter
global: Use i_close_fd instead of close Some were missed, found by coverity
global: stop including fd-set-nonblock.h & fd-close-on-exec.h directly
test: lib: Check o_stream_flush return value in proxy test Makes static analyzers happier
Updated copyright notices to include the year 2017.
lib: Add test for iostream-proxy