Make argparsing use flag for adding a new
parameter that requires parsing.
Enforce a read timeout deadline waiting for response
from the stun server provided in the args. Otherwise
the program will never exit.
Fixes#14267
Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
This updates all source files to use a new standard header for copyright
and license declaration. Notably, copyright no longer includes a date,
and we now use the standard SPDX-License-Identifier header.
This commit was done almost entirely mechanically with perl, and then
some minimal manual fixes.
Updates #6865
Signed-off-by: Will Norris <will@tailscale.com>
