Use existing network array for passing domain and path
Remove extra single quotes from network input keys
Prepare to update the network domain and path when necessary
Update the network with new information

We'll want to do some validation beforehand, otherwise this could
get ugly pretty quickly. For now, it works.
Update network, site, and site options with new data

This will need some better error handling and validation.
Delete the cache for the $current_site global on this network
Add wsuwp:network to the global cache groups

Otherwise things are very unpredictable.