Changes since version 1.16.1:
* unix: avoid malloc() call in uv_spawn() (Ben Noordhuis)
* doc: clarify the description of uv_loop_alive() (Ed Schouten)
* win: map UV_FS_O_EXLOCK to a share mode of 0 (Joran Dirk Greef)
* win: fix build on case-sensitive file systems (Ben Noordhuis)
* win: fix test runner build with mingw64 (Ben Noordhuis)
* win: remove unused variable in test/test-fs.c (Ben Noordhuis)
* zos: add strnlen() implementation (jBarz)
* unix: keep track of bound sockets sent via spawn (jBarz)
* unix,win: wait for threads to start (Ben Noordhuis)
* test: add threadpool init/teardown test (Bartosz Sosnowski)
* test: avoid malloc() in threadpool test (Ben Noordhuis)
* test: lower number of tasks in threadpool test (Ben Noordhuis)
* win: issue memory barrier in uv_thread_join() (Ben Noordhuis)
* ibmi: add support for new platform (Xu Meng)
* test: fix test-spawn compilation (Bartosz Sosnowski)
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