- freebsd::FILE_up is a wrapper class for std::unique_ptr<> for FILE
objects which uses a custom deleter that calls fclose().
- freebsd::malloc_up<T> is a wrapper class for std::unique_ptr<> which
uses a custom deleter that calls free(). It is useful for pointers
allocated by malloc() such as strdup().
- The freebsd::stringf() functions return a std::string constructed
using a printf format string.
The current implementation of freebsd::stringf() uses fwopen() where
the write function appends to a std::string.
Sponsored by: Chelsio Communications
Pull Request: https://github.com/freebsd/freebsd-src/pull/1794
