Gather additional network information from the client

[jfmartinezm]

To help support and helpdesk teams, it could be useful if some basic network information could be sent from the client and stored in the server:

• Hostname: To identify clients when the client name is different from the hostname. If there are many clients from different branches and locations, it may not be easy to identify them just by client name.
• IP Address: It could be valuable to have this information to connect to the client for troubleshooting purposes, for example. If dynamic addresses are used, it may not be easy to find out the IP Address.
• MAC Address: Storing this information could make Wake On Lan operations easier: it wouldn't be neccesary to manually specify a list of MAC addresses to wake up, and WOL for individual clients could be implemented more easily.

To implement that feature, new fields should be added to the Client table and the client code should be modified to send the required information.