fix some spell problems of doc/ServerConfiguration.md doc/TopologyService.md

Signed-off-by: SataQiu <qiushida@beyondcent.com>

doc/ServerConfiguration.md

@@ -258,7 +258,7 @@ VTTablet requires multiple user credentials to perform its tasks. Since it's req
 
 **connection** parameters
 
-* **db\_socket**: The unix socket to connect on. If this is specifed, host and port will not be used.
+* **db\_socket**: The unix socket to connect on. If this is specified, host and port will not be used.
 * **db\_host**: The host name for the tcp connection.
 * **db\_port**: The tcp port to be used with the db\_host.
 * **db\_charset**: Character set. Only utf8 or latin1 based character sets are supported.

doc/TopologyService.md

@@ -451,7 +451,7 @@ all cells to route traffic. Note this is necessary to access the master in
 another cell.
 
 After the extension to two cells, the original topo service contains both the
-global topology data, and the first cell topology data. The more symetrical
+global topology data, and the first cell topology data. The more symmetrical
 configuration we're after would be to split that original service into two: a
 global one that only contains the global data (spread across both cells), and a
 local one to the original cells. To achieve that split:
@@ -471,7 +471,7 @@ local one to the original cells. To achieve that split:
 * Remove all remaining data in the global topology service that are in the old
   local server root.
 
-After this split, the configuration is completely symetrical:
+After this split, the configuration is completely symmetrical:
 
 * a global topology service, with servers in all cells. Only contains global
   topology data about Keyspaces, Shards and VSchema. Typically it has 5 servers