Added instructions for running external database with forced SSL configuration

Author: pendula95

vertx-pg-client/README.adoc

@@ -307,7 +307,7 @@ mvn test -DcontainerFixedPort
 You can run tests with an external database:
 
 - the script `src/test/resources/create-postgres.sql` creates the test data
-- the `TLSTest` expects the database to be configured with SSL with `src/test/resources/tls/server.key` / `src/test/resources/tls/server.cert``
+- the `TLSTest` expects the database to be configured with SSL with `src/test/resources/tls/server.key` / `src/test/resources/tls/server.cert` `src/test/resources/tls/pg_hba.conf` as an example how to force SSL
 
 You need to add some properties for testing:
 
@@ -317,6 +317,7 @@ You need to add some properties for testing:
 
 - connection.uri(mandatory): configure the client to connect the specified database
 - tls.connection.uri(mandatory): configure the client to run `TLSTest` with the specified Postgres with SSL enabled
+- tls.force.connection.uri(mandatory): configure the client to run `TLSTest` with the specified Postgres with SSL forced (only option)
 - unix.socket.directory(optional): the single unix socket directory(multiple socket directories are not supported) to test Unix domain socket with a specified database, domain socket tests will be skipped if this property is not specified
 (Note: Make sure you can access the unix domain socket with this directory under your host machine)
 - unix.socket.port(optional): unix socket file is named `.s.PGSQL.nnnn` and `nnnn` is the server's port number,
@@ -335,5 +336,5 @@ Run the Postgres containers with `docker-compose`:
 Run tests:
 
 ```
-> mvn test -Dconnection.uri=postgres://$username:$password@$host:$port/$database -Dtls.connection.uri=postgres://$username:$password@$host:$port/$database -Dunix.socket.directory=$path -Dunix.socket.port=$port
+> mvn test -Dconnection.uri=postgres://$username:$password@$host:$port/$database -Dtls.connection.uri=postgres://$username:$password@$host:$port/$database -Dtls.force.connection.uri=postgres://$username:$password@$host:$port/$database -Dunix.socket.directory=$path -Dunix.socket.port=$port
 ```