FIX BUGS which may cause trap leading to " wg-quick up wg0 " failure on MACOS

[piglaker]

CLIENT: MACOS Darwin Kernel Version 20.3.0: Thu Jan 21 00:07:06 PST 2021; root:xnu-7195.81.3~1/RELEASE_X86_64
SERVER: ALGO on VLUTR
RAW(zsh) :

 > sudo wg-quick up wg0
Warning: `/private/etc/wireguard/wg0.conf' is world accessible
[#] wireguard-go utun
[+] Interface for wg0 is utun3
[#] wg setconf utun3 /dev/fd/63
[#] ifconfig utun3 inet 10.49.0.3 10.49.0.3 alias
[#] ifconfig utun3 inet6 2001:db8:a160::3 alias
[#] ifconfig utun3 up
[#] route -q -n add -inet6 ::/1 -interface utun3
[#] route -q -n add -inet6 8000::/1 -interface utun3
[#] route -q -n add -inet 0.0.0.0/1 -interface utun3
[#] route -q -n add -inet 128.0.0.0/1 -interface utun3
[#] route -q -n add -inet xxxxxxxx -gateway xxxxxxx
[#] networksetup -getdnsservers Wi-Fi
[#] networksetup -getsearchdomains Wi-Fi
[#] networksetup -getdnsservers Thunderbolt Bridge
[#] networksetup -getsearchdomains Thunderbolt Bridge
[#] networksetup -getdnsservers Bluetooth PAN
[#] networksetup -getsearchdomains Bluetooth PAN
[#] networksetup -setdnsservers Bluetooth PAN xxxx
[#] networksetup -setsearchdomains Bluetooth PAN Empty
[#] networksetup -setdnsservers Wi-Fi xxxxxx
[#] networksetup -setsearchdomains Wi-Fi Empty
[#] networksetup -setdnsservers Thunderbolt Bridge xxxxxx
[#] networksetup -setsearchdomains Thunderbolt Bridge Empty
[#] rm -f /var/run/wireguard/utun3.sock
[#] rm -f /var/run/wireguard/wg0.name
[#] route -q -n delete -inet xxxxxxx

locate darwin.bash line 233:"networksetup -listallnetworkservices"
the comman may output like this :

> networksetup -listallnetworkservices
An asterisk (*) denotes that a network service is disabled.
Wi-Fi
*Thunderbolt Bridge
Bluetooth PAN

but the later two contains " " may cause Error like this:

> networksetup -getdnsservers Thunderbolt Bridge
Thunderbolt is not a recognized network service.
** Error: The parameters were not valid.

I simply fix it and modify the Makefile ( I think installing in /usr/local/bin is better than /usr/bin)