tools (common/async_process): remove useless encoding + use full path for command: - arguments don't need to be encoded anymore, `spawnProcess` handles str directly now - use full path even for first argument: even if first argument should be only executable name, it appears that using full path only in `command` is not enough (seen with Python where system installation is used instead of the VirtualEnv one when full path is not used as first argument).

#!/bin/bash
set -e

usermod -u "$(stat -c %u /var/lib/prosody/.)" prosody

if [[ "$1" != "prosody" ]]; then
    exec prosodyctl "$@"
    exit 0;
fi

if [ "$LOCAL" -a  "$PASSWORD" -a "$DOMAIN" ] ; then
    prosodyctl register "$LOCAL" "$DOMAIN" "$PASSWORD"
fi

exec runuser -u prosody -- "$@"