Update to 1.0.20200820
    ipc: split into separate files per-platform
    wincompat: fold random into genkey
    systemd: add reload target to systemd unit
    man: wg-quick: use syncconf instead of addconf for strip example
    pubkey: isblank is a subset of isspace
    ctype: use non-locale-specific ctype.h
    wg-quick: wait on process substitutions