Keep specified attribute ordering with '--attrs' when outputing to JSON

[maaaaz]

@ropnop, here's a tiny feature asked: could it be possible to keep, in the output JSON file, the ordering of the specified attributes with the --attrs option ?

More precisely:

• Here, I asked for specific attributes, in a specific order, which is honored by standard output ("dn" comes before "cn") :

  $ ./windapsearch-linux-amd64 --dc 1.2.3.4 -u "user1@adyolo" -p "password" -m users --attrs dn,cn
  dn: CN=foo,CN=bar,DC=ADYOLO,DC=SWAG
  cn: user1

• But with JSON output, the asked order is not kept : "cn" is printed before "dn" (which is the regular JSON order), but I wanted "dn" before "cn"

  $ ./windapsearch-linux-amd64 --dc 1.2.3.4 -u "user1@adyolo" -p "password" -m users --attrs dn,cn -j
  [{"cn":"user1","dn":"CN=foo,CN=bar,DC=ADYOLO,DC=SWAG"}
  ...

Cheers !