Warriors forward Kevin Durant returned to the Warriors' locker room Monday night to find his iPhone inbox full of congratulations. [...] just two days after Golden State beat Cleveland for its second NBA title in three years, many outside the organization are already concerned about what's next: Durant, who was named Finals MVP after averaging 35.2 points and 8.2 rebounds in five games against the Cavaliers, is guarding against the chatter. If Durant signs the maximum extension for which he is eligible — which starts at roughly $35.4 million per year — Golden State would need to renounce its rights to second-unit leaders Andre Iguodala and Shaun Livingston to free up room under the salary cap. [...] ESPN reported earlier this month that Durant is willing to sign for a little less than $32 million, the most he can make in 2017-18 without the Warriors needing to create cap space. The most likely scenario has Durant signing another two-year deal with a player option in the second year to make himself eligible for another one-plus-one contract in 2018 starting at roughly $35.7 million. By waiting to sign his long-term extension and taking almost $4 million less than his...