Revert "Improve config formatting"

This reverts commit 3d0bac0df2.

Uncomment again commented out value and bump version.

Comment by Paul Wouters:
The value of 3072 was tailored to cause a failure for ANY requries to isc.org,
which are used a lot by attackers. Now with 4096,
it will fit and the query can be abused again to
cause amplification with that popular dns query.

unbound.conf

@@ -141,7 +141,7 @@ server:
 	# Suggested values are 512 to 4096. Default is 4096. 65536 disables it.
 	# 3072 causes +dnssec any isc.org queries to need TC=1.
 	# Helps mitigating DDOS
-	# max-udp-size: 3072
+	max-udp-size: 3072
 
 	# buffer size for handling DNS data. No messages larger than this
 	# size can be sent or received, by UDP or TCP. In bytes.

unbound.spec

@@ -21,7 +21,7 @@
 Summary: Validating, recursive, and caching DNS(SEC) resolver
 Name: unbound
 Version: 1.6.8
-Release: 5%{?extra_version:.%{extra_version}}%{?dist}
+Release: 6%{?extra_version:.%{extra_version}}%{?dist}
 License: BSD
 Url: https://www.unbound.net/
 Source: https://www.unbound.net/downloads/%{name}-%{version}%{?extra_version}.tar.gz
@@ -435,6 +435,9 @@ popd
 %attr(0644,root,root) %config %{_sysconfdir}/%{name}/root.key
 
 %changelog
+* Thu Feb 22 2018 Petr Menšík <pemensik@redhat.com> - 1.6.8-6
+- Uncomment again original max-upd-size
+
 * Wed Feb 21 2018 Petr Menšík <pemensik@redhat.com> - 1.6.8-5
 - Use default RPM build flags and configure parameters (#1539097)