Merge r238803, r238804 from head:

Merge r238803, r238804 from head:

  Add support for more devices to uslcom(4).  This commit syncronises the
  list of supported devices with the union of:

  NetBSD  src/sys/dev/usb/uslsa.c 1.18
  OpenBSD src/sys/dev/usb/uslcom.c 1.24
  Linux   source/drivers/usb/serial/cp210x.c HEAD

  Remove duplicate JABLOTRON PC60B entry.

  Note that some of the devices added here are multi-port devices.  The
  uslcom(4) driver currently only supports the first port on such devices.

  Update the man page to reflect the full list of supported devices.
  Remove two caveats from the CAVEATS section, as both listed caveats no
  longer apply.  Add a caveat about multi-port devices.

  Improve descriptions for several devices supported by uslcom(4).
  Correct the spelling of the company Telegesis.
  Move MpMan to the correct location alphabetically.

git-svn-id: svn://svn.freebsd.org/base/stable/8@239820 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f