Doc: fix high availability solutions comparison.

In "High Availability, Load Balancing, and Replication" chapter,
certain descriptions of Pgpool-II were not correct at this point.  It
does not need conflict resolution. Also "Multiple-Server Parallel
Query Execution" is not supported anymore.

Discussion: https://postgr.es/m/20200726.230128.53842489850344110.t-ishii%40sraoss.co.jp
Author: Tatsuo Ishii
Reviewed-by: Bruce Momjian
Backpatch-through: 9.5

diff --git a/doc/src/sgml/high-availability.sgml b/doc/src/sgml/high-availability.sgml
index 89f6d6eda6362bb270b94e581081955274fa6724..a824d383f2d898d68a9aabbb5f3e55ebf1965a18 100644 (file)
--- a/doc/src/sgml/high-availability.sgml
+++ b/doc/src/sgml/high-availability.sgml
@@ -429,7 +429,7 @@ protocol to make nodes agree on a serializable transactional order.
      •
      
      •
-     
+     •
      
      •
     
@@ -471,8 +471,7 @@ protocol to make nodes agree on a serializable transactional order.
      concurrently on a single query.  It is usually accomplished by
      splitting the data among servers and having each server execute its
      part of the query and return results to a central server where they
-     are combined and returned to the user.  Pgpool-II
-     has this capability.  Also, this can be implemented using the
+     are combined and returned to the user. This can be implemented using the
      PL/Proxy tool set.