Improved dual VPN uninstallation, remove duplicate code/script

- Allow using 'pivpn vpn -u' to directly uninstall VPN 'vpn'
  - Also allow using 'pivpn -u' with two VPNs (will present a dialog).
  - During uninstall, ask which VPN to remove only if there are two VPNs
  - PiVPN git repo will be downloaded to '/usr/local/src/pivpn'. All scripts
    in /opt/pivpn, the main pivpn script and the bash completion file,
    are now just symbolic links. Resolves issue #695.
  - Remove unused call to updateWireGuard().

scripts/openvpn/pivpn.sh

@@ -47,30 +47,19 @@ function removeOVPNFunc {
 }
 
 function uninstallFunc {
-    $SUDO ${scriptDir}/uninstall.sh
+    $SUDO ${scriptDir}/uninstall.sh "${vpn}"
     exit 0
 }
 
-function versionFunc {
-    printf "\e[1mVersion 1.9\e[0m\n"
-}
-
 function update {
-
     shift
-    # $SUDO ${scriptDir}/update.sh "$@"
-    echo "::: The updating functionality for PiVPN scripts is temporarily disabled"
-    echo "::: To keep the VPN (and the system) up to date, use 'apt update' and 'apt upgrade'"
+    $SUDO ${scriptDir}/update.sh "$@"
     exit 0
-
-
 }
 
 function backup {
-
     $SUDO ${scriptDir}/backup.sh
     exit 0
-
 }
 
 
@@ -105,7 +94,6 @@ case "$1" in
 "-r" | "revoke"             ) removeOVPNFunc "$@";;
 "-h" | "help"               ) helpFunc;;
 "-u" | "uninstall"          ) uninstallFunc;;
-"-v"                        ) versionFunc;;
 "-up"| "update"             ) update "$@" ;;
 "-bk"| "backup"             ) backup;;
 *                           ) helpFunc;;

scripts/openvpn/pivpnDebug.sh

@@ -13,7 +13,7 @@ source "${setupVars}"
 echo -e "::::\t\t\e[4mPiVPN debug\e[0m\t\t ::::"
 printf "=============================================\n"
 echo -e "::::\t\t\e[4mLatest commit\e[0m\t\t ::::"
-git --git-dir /etc/.pivpn/.git log -n 1
+git --git-dir /usr/local/src/pivpn/.git log -n 1
 printf "=============================================\n"
 echo -e "::::\t    \e[4mInstallation settings\e[0m    \t ::::"
 sed "s/$pivpnHOST/REDACTED/" < ${setupVars}