v4.0.0
misc: Add test_nsutils to gitignore
build-sys: split test cases in lib/ into their own files
docs: fix "delimeter" typo in fprocopen man page
procio: fix potential out-of-bounds access when write fails
0041-proc/sig.c: Harden print_given_signals().
A locale-independent strtod
Added Cygwin build support
testsuite: Make test program compile on Hurd