HAWQ-1368 Add option to hawq register to specify log directory

Author: outofmem0ry

markdown/reference/cli/admin_utilities/hawqregister.html.md.erb

@@ -201,7 +201,7 @@ group {
 <dd>Show the version of this utility, then exit.</dd>
 
 <dt>-l, -\\\-logdir \<logfile\_directory\>  </dt>
-<dd>Specifies the log directory that `hawq register` uses for logs. The default is `~/hawqAdminLogs/`.</dd>
+<dd>Specifies the directory that `hawq register` uses for logs. The default is `~/hawqAdminLogs/`.</dd>
 
 **Connection Options**