Block even more ports for NAT Slipstreaming v2.0

Tests: web-platform-tests/wpt#27990.

Follow-ups: #1189 & #1191.

Fixes part of #544.

Author: mozfreddyb

fetch.bs

@@ -2324,6 +2324,7 @@ run these steps:
  <tr><td>42<td>name
  <tr><td>43<td>nicname
  <tr><td>53<td>domain
+ <tr><td>69<td>tftp
  <tr><td>77<td>—
  <tr><td>79<td>finger
  <tr><td>87<td>—
@@ -2341,8 +2342,10 @@ run these steps:
  <tr><td>119<td>nntp
  <tr><td>123<td>ntp
  <tr><td>135<td>epmap
+ <tr><td>137<td>netbios-ns
  <tr><td>139<td>netbios-ssn
  <tr><td>143<td>imap
+ <tr><td>161<td>snmp
  <tr><td>179<td>bgp
  <tr><td>389<td>ldap
  <tr><td>427<td>svrloc
@@ -2357,19 +2360,24 @@ run these steps:
  <tr><td>532<td>netnews
  <tr><td>540<td>uucp
  <tr><td>548<td>afp
+ <tr><td>554<td>rtsp
  <tr><td>556<td>remotefs
  <tr><td>563<td>nntps
  <tr><td>587<td>submission
  <tr><td>601<td>syslog-conn
  <tr><td>636<td>ldaps
  <tr><td>993<td>imaps
  <tr><td>995<td>pop3s
+ <tr><td>1719<td>h323gatestat
+ <tr><td>1720<td>h323hostcall
+ <tr><td>1723<td>pptp
  <tr><td>2049<td>nfs
  <tr><td>3659<td>apple-sasl
  <tr><td>4045<td>npp
  <tr><td>5060<td>sip
  <tr><td>5061<td>sips
  <tr><td>6000<td>x11
+ <tr><td>6566<td>sane-port
  <tr><td>6665<td>ircu
  <tr><td>6666<td>ircu
  <tr><td>6667<td>ircu