Escaped characters that cause an external request in-between forward slashes

<div style="background:url('/\0x09/fuzz.shazzer.co.uk/ozak2alrd5?9')">

<div style="background:url('/\
/fuzz.shazzer.co.uk/8xoqcush5jv?10')">

<div style="background:url('/\0x0C/fuzz.shazzer.co.uk/mlt404zp85s?12')">

<div style="background:url('/\0x0D/fuzz.shazzer.co.uk/ig7w4oz6tv?13')">

<div style="background:url('/\//fuzz.shazzer.co.uk/5xg6t9wg9ov?47')">

<div style="background:url('/\9/fuzz.shazzer.co.uk/s5xr6e0d19?57')">

<div style="background:url('/\A/fuzz.shazzer.co.uk/ot7wb3h3ev?65')">

<div style="background:url('/\D/fuzz.shazzer.co.uk/eew3vjp46zm?68')">

<div style="background:url('/\a/fuzz.shazzer.co.uk/bwje0ohw866?97')">

<div style="background:url('/\d/fuzz.shazzer.co.uk/svu6ym6qfvl?100')">

<div style="background:url('/\0x09/fuzz.shazzer.co.uk/yjihyplet6o?9')">

<div style="background:url('/\
/fuzz.shazzer.co.uk/t0lox1jco4?10')">

<div style="background:url('/\0x0C/fuzz.shazzer.co.uk/vjnyem6m9h9?12')">

<div style="background:url('/\0x0D/fuzz.shazzer.co.uk/g2d3ol9mc2?13')">

<div style="background:url('/\//fuzz.shazzer.co.uk/h4m1pcdgpzr?47')">

<div style="background:url('/\9/fuzz.shazzer.co.uk/wv25w0ji8gg?57')">

<div style="background:url('/\A/fuzz.shazzer.co.uk/wmrjhc0vpfs?65')">

<div style="background:url('/\D/fuzz.shazzer.co.uk/9knwgjhnesm?68')">

<div style="background:url('/\\/fuzz.shazzer.co.uk/dv6gtr0w104?92')">

<div style="background:url('/\a/fuzz.shazzer.co.uk/439dwgnr0zf?97')">