Make port number configurable.

script/import_scripts/phpbb3/database/database.rb

@@ -34,6 +34,7 @@ module ImportScripts::PhpBB3
     def create_database_client
       Mysql2::Client.new(
         host: @database_settings.host,
+        port: @database_settings.port,
         username: @database_settings.username,
         password: @database_settings.password,
         database: @database_settings.schema

script/import_scripts/phpbb3/settings.yml

@@ -3,6 +3,7 @@
 database:
   type: MySQL # currently only MySQL is supported - more to come soon
   host: localhost
+  port: 3306
   username: root
   password:
   schema: phpbb

script/import_scripts/phpbb3/support/settings.rb

@@ -61,6 +61,7 @@ module ImportScripts::PhpBB3
   class DatabaseSettings
     attr_reader :type
     attr_reader :host
+    attr_reader :port
     attr_reader :username
     attr_reader :password
     attr_reader :schema
@@ -70,6 +71,7 @@ module ImportScripts::PhpBB3
     def initialize(yaml)
       @type = yaml['type']
       @host = yaml['host']
+      @port = yaml['port']
       @username = yaml['username']
       @password = yaml['password']
       @schema = yaml['schema']