doc: Clean up title case use

doc/src/sgml/appendix-obsolete-auth-radius.sgml

@@ -4,7 +4,7 @@
 -->
 
 <sect1 id="auth-radius">
-  <title>RADIUS authentication removed</title>
+  <title>RADIUS Authentication Removed</title>
 
    <indexterm zone="auth-radius">
     <primary>RADIUS</primary>

doc/src/sgml/runtime.sgml

@@ -2649,11 +2649,11 @@ openssl x509 -req -in server.csr -text -days 365 \
     <xref linkend="hostname-values"/> contains details on how these values are
     used.
     <table id="hostname-values">
-     <title>Hostname field values</title>
+     <title>Hostname Field Values</title>
      <tgroup cols="3">
       <thead>
        <row>
-        <entry>Host Entry</entry>
+        <entry>Host entry</entry>
         <entry>Hostname extension</entry>
         <entry>Description</entry>
        </row>

doc/src/sgml/wal.sgml

@@ -293,7 +293,7 @@
 
    <para>
     <figure id="data-checksums-states-figure">
-     <title>data checksums states</title>
+     <title>Data Checksums States</title>
      <mediaobject>
       <imageobject>
        <imagedata fileref="images/datachecksums.svg" format="SVG" width="100%"/>
@@ -348,7 +348,7 @@
    </para>
 
    <sect3 id="checksums-online-system-impact">
-    <title>Impact on system of online operations</title>
+    <title>Impact on System of Online Operations</title>
     <para>
      Enabling data checksums can cause significant I/O to the system, as all of the
      database pages will need to be rewritten, and will be written both to the

doc/src/sgml/xfunc.sgml

@@ -3716,7 +3716,7 @@ my_shmem_init(void *arg)
     </sect3>
 
     <sect3 id="xfunc-shared-addin-after-startup">
-     <title>Requesting Shared Memory After Startup with <function>ShmemRequestStruct</function></title>
+     <title>Requesting Shared Memory after Startup with <function>ShmemRequestStruct</function></title>
 
      <para>
       The <function>ShmemRequestStruct()</function> can also be called after
@@ -3745,7 +3745,7 @@ my_shmem_init(void *arg)
     </sect3>
 
     <sect3 id="xfunc-shared-addin-dynamic">
-     <title>Allocating Dynamic Shared Memory After Startup</title>
+     <title>Allocating Dynamic Shared Memory after Startup</title>
 
      <para>
       There is another, more flexible method of reserving shared memory that
@@ -3811,7 +3811,7 @@ LWLockPadded *GetNamedLWLockTranche(const char *tranche_name)
     </sect3>
 
     <sect3 id="xfunc-addin-lwlocks-after-startup">
-     <title>Requesting LWLocks After Startup</title>
+     <title>Requesting LWLocks after Startup</title>
 
      <para>
       There is another, more flexible method of obtaining LWLocks that can be