[system-administrators-guide] Putting a space between RFC and the number {for consistency}

[stephenw]

commit d66287db33e3a19a6d7146f4575bdda5c561a1a3
Author: Stephen Wadeley <swadeley at redhat.com>
Date:   Wed Jul 30 23:29:27 2014 +0200

    Putting a space between RFC and the number {for consistency}

 en-US/Configuring_NTP_Using_the_chrony_Suite.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/en-US/Configuring_NTP_Using_the_chrony_Suite.xml b/en-US/Configuring_NTP_Using_the_chrony_Suite.xml
index 1068221..53eaaa6 100644
--- a/en-US/Configuring_NTP_Using_the_chrony_Suite.xml
+++ b/en-US/Configuring_NTP_Using_the_chrony_Suite.xml
@@ -82,7 +82,7 @@ Things <systemitem class="daemon">ntpd</systemitem> can do that <systemitem clas
 <itemizedlist>
 <listitem>
   <para>
-    <systemitem class="daemon">ntpd</systemitem> fully supports <systemitem class="protocol">NTP</systemitem> version 4 (<citetitle pubwork="webpage">RFC5905</citetitle>), including broadcast, multicast, manycast clients and servers, and the orphan mode. It also supports extra authentication schemes based on public-key cryptography (<citetitle pubwork="webpage">RFC5906</citetitle>). <systemitem class="daemon">chronyd</systemitem> uses <systemitem class="protocol">NTP</systemitem> version 3 (<citetitle pubwork="webpage">RFC1305</citetitle>), which is compatible with version 4.
+    <systemitem class="daemon">ntpd</systemitem> fully supports <systemitem class="protocol">NTP</systemitem> version 4 (<citetitle pubwork="webpage">RFC 5905</citetitle>), including broadcast, multicast, manycast clients and servers, and the orphan mode. It also supports extra authentication schemes based on public-key cryptography (<citetitle pubwork="webpage">RFC 5906</citetitle>). <systemitem class="daemon">chronyd</systemitem> uses <systemitem class="protocol">NTP</systemitem> version 3 (<citetitle pubwork="webpage">RFC 1305</citetitle>), which is compatible with version 4.
   </para>
 </listitem>
   <listitem>