pcre.ffi: Use pcre.dll on Windows.
io.sockets.windows: Fix unit test--recover leaves socket on stack, nip
it.
io.launcher.windows: Don't cd to directory when calling run-process. Fixes
io.sockets.windows: Spacing cleanup.
io.directories: Add unit test for #890.
compiler.cfg.build-stack-frame: Fix test for win64
io.backend.unix: { fixnum } read will be a { fixnum } .
io.buffers: adding a buffer-read-into that can take a c-ptr or a sequence.
io.buffers: simplify test word.