tools/netperf: Use pipe to pass result back instead of tmp file
Fix i386 world build.

* Patch will be sent upstream to mdocml.
hammer - Add HAMMER_PFS_ITERATE ioctl

* It allows iterating through all created PFSes and
  retrieving the information from them.
libhammer - Make use of the HAMMERIOC_PFS_ITERATE ioctl.

* With this change 'info' directive no longer issues 65535 ioctl
  calls to retrieve the information of all PFSes.
Update pkg bootstraps

The naming scheme for pkg bootstraps is inadequate.  Even if it were to
include the release, library updates could necessitate the generation
of a new bootstrap more than once per release.  Therefore, I've added
a serial in the name.  The name is now:

  bootstrap_pkg_${SERIAL}_x86-${32,64}.tar.xz

Bootstrap 01 has been created and put on mirror master.  The original
bootstraps stopped working after the locales update.