Re-enable PDF building

Remove also conditionals for RHEL. RHEL8 and 9 has different
requirements, it does not make sense to tune them in Fedora package
itself. CentOS Stream 9 has already public spec adjusted to RHEL.

bind.spec

@@ -18,20 +18,13 @@
 %bcond_without DLZ
 # New MaxMind GeoLite support
 %bcond_without GEOIP2
-%if 0%{?fedora} >= 28
 # Disabled temporarily until kyua is fixed on rawhide, bug #1926779
 %bcond_with UNITTEST
 %bcond_without DNSTAP
 %bcond_without LMDB
 %bcond_without DOC
-%else
-%bcond_with    UNITTEST
-%bcond_with    DNSTAP
-%bcond_with    LMDB
-%bcond_with    DOC
-%endif
 # Because of issues with PDF rebuild, include only HTML pages
-%bcond_with    DOCPDF
+%bcond_without DOCPDF
 %bcond_with    TSAN
 
 %{?!bind_uid:  %global bind_uid  25}
@@ -62,7 +55,7 @@ Summary:  The Berkeley Internet Name Domain (BIND) DNS (Domain Name System) serv
 Name:     bind
 License:  MPLv2.0
 Version:  9.16.18
-Release:  1%{?PATCHVER:.%{PATCHVER}}%{?PREVER:.%{PREVER}}%{?dist}
+Release:  2%{?PATCHVER:.%{PATCHVER}}%{?PREVER:.%{PREVER}}%{?dist}
 Epoch:    32
 Url:      https://www.isc.org/downloads/bind/
 #
@@ -1136,6 +1129,9 @@ fi;
 %endif
 
 %changelog
+* Tue Jun 22 2021 Petr Menšík <pemensik@redhat.com> - 32:9.16.18-2
+- Re-enable building of PDF ARM documentation
+
 * Fri Jun 18 2021 Petr Menšík <pemensik@redhat.com> - 32:9.16.18-1
 - Update to 9.16.18