[boost] [interprocess::file_mapping] Please add resize method

Hello, Could you please add resize method to the file_mapping class? Also please don't fill file with zeros by default? This functionality increases latency spikes. Make it as quick as possible. Thanks. Best regards. Dima -- Dmytro Ovdiienko e-mail: dmitriy.ovdienko@gmail.com skype: dmitriy.ovdienko@gmail.com mobile: +38050-1909731