* Update ESP8266WiFiAP.cpp
It is not very common but some might require to set the maximum number of clients, from code, to smaller than 4.
in my case i must allow only one client at a time (TESTED WORKING)
* Update ESP8266WiFiAP.h
as discussed in the .cpp (set max connections)
* Update ESP8266WiFiAP.cpp
corrected indentation @70
add param comment @86
* Update ESP8266WiFiAP.cpp
An empty passphrase string should enable AUTH_OPEN mode of softAP.
This was the behaviour before commit 293e55c.
Additionally make the type of checking for empty strings consistent.
