[Tagging] Automatic edit: access=visitors --> access=customers

[Jonathan]

Personally I feel that we shouldn't go down the rabbit hole of arguing 
over the difference between  visitors, clients, customers, patients, 
guests, end-users, consumers, shoppers .....

They all visit a place at the invite of the owner or operator for the 
purpose of some business or commercial relationship as a recipient.

Customers isn't perfect but it's a standard we've used widely.

I don't know how many occurrences of visitors there are but I wouldn't be 
averse to a measured automatic edit.

Jonathan