added NHibernate stanza to the config which reduces our verboseness

to reasonable levels

bin/OpenSim.exe.config

@@ -11,6 +11,7 @@
         <conversionPattern value="%date{HH:mm:ss} - %message%newline" />
       </layout>
     </appender>
+
     <appender name="LogFileAppender" type="log4net.Appender.FileAppender">
       <file value="OpenSim.log" />
       <appendToFile value="true" />
@@ -19,6 +20,12 @@
       </layout>
     </appender>
 
+    <!-- if you'd like to know what NHibernate is doing more set value="DEBUG" -->
+    <logger name="NHibernate" additivity="false">
+      <level value="INFO"/>
+      <appender-ref ref="NHibernateFileLog"/>
+    </logger>
+
     <root>
       <level value="DEBUG" />
       <appender-ref ref="Console" />