Make attribs array use optional aliases

[Jon Elofson]

if attrib uses a key value pair, use the key as the real attribute and the value as an alias.

So, in the result array, you can use locality instead of l, for example....

$attribs = [
    'l'=>'locality',
    'mail'=>'email',
    'cn', 
    'givenname', 
];

[Jon Elofson]

fixed with new method to set attribute aliases