Update FSF address.
daemon: Don't use ../src path to include generator_protocol.h This file is already hard-linked into the current directory, so the relative path is not required.
New API calls: truncate, truncate_size, mkdir_mode, utimens, lchown. truncate, truncate_size: Used to truncate files to a particular size, or to zero bytes. mkdir_mode: Like mkdir but allows you to also specify the initial permissions for the new directory. utimens: Set timestamp on a file with nanosecond accuracy. lchown: Corresponding to lchown(2) syscall (we already have chown). The implementation is complicated by the fact that we had to add an Int64 parameter type to the generator.