Shellcheck compliance
Shellcheck compliance

scripts/wireguard/pivpnDEBUG.sh
  * SC1090: ShellCheck can't follow non-constant source. Use a directive to specify location.
    * Disabled warning
  * SC2154: <VarName> is referenced but not assigned.
    * Disabled warning
  * SC2086: Double quote to prevent globbing and word splitting.
    * Added double quotes

pivpn/pivpn