am c9eaab1b: Merge remote-tracking branch \'toybox/master\' into HEAD

am c9eaab1b: Merge remote-tracking branch \'toybox/master\' into HEAD

* commit 'c9eaab1bd1a7fb8540126e035281a15feb5a3c42': (22 commits)
  Detect swap partitions, inline loop_partitions(), various cleanups.
  Initialize uninitialized variable. (Oops.)
  Adjust xexec() exit code to be 127, and tweaks for nommu friendliness.
  Make multiplexer's "command not found" exit 127.
  I've added support for running blkid without specifying a partition (so it scans /proc/partitions).
  Minor tweak of reboot.c
  reboot: signal init, add -f option to call reboot(); init: use SIGINT, use xsignal()
  Cosmetic tweak: newline at the end of "make change".
  Switch nbd_client to xconnect() and make xconnect() try all returned addresses before failing.
  Tweak xconnect: socket can be a string (ala "ftp") from /etc/services.
  Factor out xconnect(), plus some other small cleanups to telnet.c.
  Mark command-local functions static.
  Long-overdue cleanup on login.
  Replace xcheckrange() with atolx_range()
  Move strlower() from find to lib.
  '!' replaces '/' in the sysfs paths of older drivers, so properly reverse that to get correct paths. While we're here, reduce the duplication of initialization.
  Whitespace.
  Check in the note about rebuilding the source tarball.
  Promote fsync.
  Promote hostid.
  ...