Nethserver is PDC,then enable web proxy and authentication

[alefattorini (Alessio Fattorini)]

@zr5849373

i test the scenario again.i find that firefox donot support ntlm authentication,IE11 could support,but IE11 open page slowly

Ehi Robert,
welcome on NethServer! Thanks for your tests and your report maybe it could be useful for our proxy guys @davide_marini and @giacomo

p.s. please introduce yourself here, I’m curious Welcome to NethServer Community - #156