illumos gate

libproc allocates memory on behalf of callers in a couple functions. However, it currently expects them to call free(). This is an anti-pattern. Importantly, due to the way that binding and interposing work, the malloc and free that libproc is using could be very different from the caller. For example, libproc could end up calling malloc using libc's malloc and the caller may be using libumem. The solution here is simple, for any routine where we're allocating memory for the caller (about two or three), we need a corresponding free.