Put SW support policy URL in a separate paragraph

Ensure the URL for ISC's software support policy does not go off the
edge of the page in the PDF version of the release notes.
52 jobs for !2331 with michal/misc-doc-fixes-v9_11
detached
Status Job ID Name Coverage
  Precheck
canceled 🐞:sid:amd64 #322491
amd64 linux

00:00:04

canceled autoreconf:sid:amd64 #322489
amd64 linux

00:00:04

canceled misc:sid:amd64 #322490
amd64 linux

00:00:04

 
  Build
canceled asan:sid:amd64 #322503
amd64 linux

canceled clang:stretch:amd64 #322504
amd64 linux

canceled clang:stretch:i386 #322505
i386 linux

canceled gcc:alpine3.10:amd64 #322492
amd64 linux

canceled gcc:bionic:amd64 #322502
amd64 linux

canceled gcc:buster:amd64 #322497
i386 linux

canceled gcc:centos6:amd64 #322493
amd64 linux

canceled gcc:centos7:amd64 #322494
amd64 linux

canceled gcc:fedora30:amd64 #322500
amd64 linux

canceled gcc:jessie:amd64 #322495
amd64 linux

canceled gcc:sid:amd64 #322498
amd64 linux

canceled gcc:sid:i386 #322499
i386 linux

canceled gcc:stretch:amd64 #322496
amd64 linux

canceled gcc:xenial:amd64 #322501
amd64 linux

canceled nocrypto:sid:amd64 #322506
amd64 linux

canceled nolibtool:sid:amd64 #322508
amd64 linux

canceled pkcs11:sid:amd64 #322507
amd64 linux

 
  Unit
canceled unit:asan:sid:amd64 #322520
amd64 linux

canceled unit:clang:stretch:amd64 #322521
amd64 linux

canceled unit:gcc:alpine3.10:amd64 #322509
amd64 linux

canceled unit:gcc:bionic:amd64 #322519
amd64 linux

canceled unit:gcc:buster:amd64 #322514
i386 linux

canceled unit:gcc:centos6:amd64 #322510
amd64 linux

canceled unit:gcc:centos7:amd64 #322511
amd64 linux

canceled unit:gcc:fedora30:amd64 #322517
amd64 linux

canceled unit:gcc:jessie:amd64 #322512
amd64 linux

canceled unit:gcc:sid:amd64 #322515
amd64 linux

canceled unit:gcc:sid:i386 #322516
i386 linux

canceled unit:gcc:stretch:amd64 #322513
amd64 linux

canceled unit:gcc:xenial:amd64 #322518
amd64 linux

canceled unit:nocrypto:sid:amd64 #322522
amd64 linux

canceled unit:nolibtool:sid:amd64 #322524
amd64 linux

canceled unit:pkcs11:sid:amd64 #322523
amd64 linux

 
  System
canceled system:asan:sid:amd64 #322536
amd64 linux

canceled system:gcc:alpine3.10:amd64 #322525
amd64 linux

canceled system:gcc:bionic:amd64 #322535
amd64 linux

canceled system:gcc:buster:amd64 #322530
i386 linux

canceled system:gcc:centos6:amd64 #322526
amd64 linux

canceled system:gcc:centos7:amd64 #322527
amd64 linux

canceled system:gcc:fedora30:amd64 #322533
amd64 linux

canceled system:gcc:jessie:amd64 #322528
amd64 linux

canceled system:gcc:sid:amd64 #322531
amd64 linux

canceled system:gcc:sid:i386 #322532
i386 linux

canceled system:gcc:stretch:amd64 #322529
amd64 linux

canceled system:gcc:xenial:amd64 #322534
amd64 linux

canceled system:nocrypto:sid:amd64 #322537
linux amd64

canceled system:nolibtool:sid:amd64 #322539
amd64 linux

canceled system:pkcs11:sid:amd64 #322538
amd64 linux

 
  Docs
canceled docs:sid:amd64 #322540
amd64 linux