- Use libusb20_strerror() function instead of custom usb_error() one.
- Rename "aux.[ch]" to "util.[ch]" which is a more common name for
utility functions and allows checkout on some non-FreeBSD systems
where the "aux.*" namespace is reserved.
- Fix some compile warnings while at it.

PR:		usb/183728
MFC after:	2 weeks
Whitespace.
Comments. Replace a funny syntax with f_isset() while here.
Add global DEBUG_INITIALIZE_FILE environment variable for controlling
whether the debugFile is truncated upon initialization (useful for when
children implicitly re-initialize debugging and you want children to
append to your existing debugFile).
Add an f_show_err() function -- acts pretty much the same as f_show_msg()
except it stylizes the msgbox widget to indicate an Error has occurred by
setting an appropriate title and default message.
Add an f_eval_catch() function for debugging individual commands in a
series of commands. Accepts the `-d' flag as a first argument to skip
displaying messages in a dialog box. The command is logged as it
appears to the shell prior to the first pass of parameter expansion to
allow copy/pasting into a real shell (opposed to simply echo'ing the
command which would produce debug output that has undergone at least one
pass of parameter expansion, thus no-longer copacetic for copy/paste).
Takes printf(1) style syntax and a utility identifier for error messages.
Use dialog(1) to obtain maximum-size; stty fails when running in a pipe-
chain. This allows dialogs to reach full size even when executed as an
rvalue operand to a pipe (e.g., cat file | bsdconfig -f-).
Fix a silly bug that would result in attempting to fetch (literally) the
URI "httpDirectory" (oops).
Add some helpful debugging (showing the resolved host address).
Comments.
Fix a bug where a format with leading `-' could be mistaken for printf
getopts argument(s).
Add f_sprintf() and f_vsprintf() to go along with previously added
f_snprintf() and f_vsnprintf() (size-constraint) functions.
Comments.
Fix an off-by-one error that was causing menus to look funny.
Replace pkg-tools with pkgng.
Finish r257779.

PR:	usb/183728
devd: fix a typo in a comment

Reviewed by:	asomers
devd: lower priority of action execution logging to info

Reviewed by:	asomers
Use htons()/ntohs() appropriately.
These issues were reported by Andrew Galante.

MFC after: 3 days
- Update release noted to DocBook 5.0 so that they work with the new tree