Clean up to ensure tag completion as required by the newest versions

 of Norm's Modular Style Sheets and jade/docbook.
From Vince Vielhaber <vev@michvhf.com>.

Author: Thomas G. Lockhart

doc/src/sgml/about.sgml

@@ -4,15 +4,15 @@
 <Para>
      <ProductName>PostgreSQL</ProductName>  is  available  without cost. This manual
      describes version 6.4 of <ProductName>PostgreSQL</ProductName>.
-
+</Para>
 <Para>
      We will use <ProductName>Postgres</ProductName> 
 to mean the version distributed as <ProductName>PostgreSQL</ProductName>.
-
+</Para>
 <Para>
 Check the Administrator's Guide for a list of currently supported machines. 
 In general,
 <ProductName>Postgres</ProductName> is portable to any Unix/Posix-compatible system
 with full libc library support.
-
+</Para>
 </Sect1>

doc/src/sgml/advanced.sgml

@@ -66,6 +66,7 @@ SELECT name, altitude
 |Mariposa  | 1953     |
 +----------+----------+
 </ProgramListing>         
+</Para>
 
 <Para>
      On the other hand, to find the  names  of  all  cities,
@@ -111,6 +112,7 @@ SELECT c.name, c.altitude
      sub-values that can be  accessed  from  the  query
      language.   For example, you can create attributes that
      are arrays of base types.
+</Para>
 
 <Sect2>
 <Title>Arrays</Title>
@@ -210,7 +212,7 @@ SELECT SAL_EMP.schedule[1:2][1:1]
 +-------------------+
 </ProgramListing>
 </Para>
-
+</sect2>
 </Sect1>
 
 <Sect1>
@@ -286,13 +288,15 @@ On UNIX systems, this is always  midnight,  January  1, 1970 GMT.
 |Mariposa | 1320       |
 +---------+------------+
 </ProgramListing>
+</Para>
 
 <Para>
      The default beginning of a time range is  the  earliest
      time representable by the system and the default end is
      the current time; thus, the above  time  range  can  be
      abbreviated as ``[,].''
 </Para>
+</sect1>
 
 <Sect1>
 <Title>More Advanced Features</Title>
@@ -301,5 +305,7 @@ On UNIX systems, this is always  midnight,  January  1, 1970 GMT.
 <ProductName>Postgres</ProductName> has many features not touched upon in this
 tutorial introduction, which has been oriented toward newer users of <Acronym>SQL</Acronym>.
 These are discussed in more detail in both the User's and Programmer's Guides.
+</Para>
 
+</sect1>
 </Chapter>

doc/src/sgml/arch-dev.sgml

@@ -30,6 +30,7 @@
 </Para>
 </ListItem>
 </ItemizedList>
+</Para>
 
 <Para>
      A single  <Application>postmaster</Application>  manages  a  given  collection  of
@@ -76,5 +77,5 @@
      case, all files relating to a database should belong to
      this <ProductName>Postgres</ProductName> superuser.
 </Para>
-
+</sect1>
 </Chapter>

doc/src/sgml/arch-pg.sgml

@@ -30,7 +30,7 @@
 </Para>
 </ListItem>
 </ItemizedList>
-
+</para>
 <Para>
      A single  <Application>postmaster</Application>  manages  a  given  collection  of
      databases  on  a  single  host.   Such  a collection of
@@ -79,5 +79,5 @@ Furthermore,  the  <ProductName>Postgres</ProductName>  superuser should
      case, all files relating to a database should belong to
      this <ProductName>Postgres</ProductName> superuser.
 </Para>
-
+</sect1>
 </Chapter>

doc/src/sgml/arch.sgml

@@ -12,6 +12,7 @@
      In  database  jargon,  <ProductName>Postgres</ProductName> uses a simple "process  
      per-user" client/server model.  A <ProductName>Postgres</ProductName> session 
      consists of the following cooperating UNIX processes (programs):
+</Para>
 
 <ItemizedList>
 <ListItem>
@@ -53,6 +54,7 @@
      <Application>postmaster</Application>.   Hence, the <Application>postmaster</Application> is always running, waiting
      for requests, whereas frontend  and  backend  processes
      come  and  go.
+</Para>
 
 <Para>
   The <FileName>libpq</FileName> library allows a single 
@@ -69,6 +71,7 @@
      machine may not be accessible (or may only be  accessed
      using  a  different  filename)  on  the database server
      machine.
+</Para>
 
 <Para>
      You should also be aware that the <Application>postmaster</Application> and  
@@ -81,5 +84,5 @@
      case, all files relating to a database should belong to
      this <ProductName>Postgres</ProductName> superuser.
 </Para>
-
+</sect1>
 </Chapter>