Optimization of adblock-lean

Installing and Using OpenWrt
742

Also need to update the custom_script example in the readme. Should be something like:

#!/bin/sh

report_success()
{
mailbody="${1}"
mailsend -port 587 -smtp smtp-relay.sendinblue.com -auth -f FROM@EMAIL.COM -t TO@EMAIL.COM -user BREVO@USERNAME.COM -pass PASSWORD -sub "Adblock-lean blocklist update success" -M "${mailbody}"
}

report_failure()
{
mailbody="${1}"
mailsend -port 587 -smtp smtp-relay.sendinblue.com -auth -f FROM@EMAIL.COM -t TO@EMAIL.COM -user BREVO@USERNAME.COM -pass PASSWORD -sub "Adblock-lean blocklist update failed" -M "${mailbody}"
}