Fix surfshark openvpn configs for Linux

prepare-surfshark-configs.sh

# Start tor service and test if `tor-resolve github.com` returns an IP

# create a file 'login' beside of config files with content:
# OPENVPN_USERNAME
# OPENVPN_PASSWORD

# download https://github.com/alfredopalhares/openvpn-update-resolv-conf project to somewhere and update bottom path
openvpnUpdateResolvePath="/path/to/openvpn-update-resolv-conf"

for f in /path/to/Surfshark_Config/*.ovpn
do

# convert subdomains to IP
domain=$(awk 'FNR == 4 {print $2}' $f)
echo $domain

if [[ $domain =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
  echo "no need to process"
else
  echo "processing"
  
  domainIP=$(tor-resolve $domain)
  echo $domainIP

  sed -i "s/$domain/$domainIP/" $f
fi


# use login file to prevent asking username/password on connect
sed -i "s/auth-user-pass/auth-user-pass login/" $f
# insert three line of config at line 21
sed -i "21iscript-security 2\nup $openvpnUpdateResolvePath/update-resolv-conf.sh\ndown $openvpnUpdateResolvePath/update-resolv-conf.sh\n" $f

echo "Finished processing of: $f"
done