Removed inactive maintainer.
Cleaned up Makefile to remove old options.
Switched to PKG_INSTALL for consistency.
Added PKG_BUILD_PARALLEL for faster compilation.
Fixed license info.
Removed '' from enabled for consistency.
Ran init script through shellcheck. Batched config file writes.
Switched it to use procd. The -S parameter changes it to foreground. It
stands for systemd.
Added a sysctl tweak to get rid of warning.
Signed-off-by: Rosen Penev <rosenp@gmail.com>