Improve the debugging output - use the MAC address rather than various
pointer values everywhere.
As python3 does not have raw_input(), convert it to input() when we
are using python3.

PR:	177214
Reviewed by:	gnn
Approved by:	sbruno (mentor)
Fix typo in net.inet.tcp.minmss sysctl description.

MFC after:	3 days
Deal correctly with 40G ports that don't have any transceiver plugged
in.  Do not claim that they have unknown tranceivers.

MFC after:	3 days
Remove a bogus re-assignment.

MFC after:	3 days
Use an ugly hack to get around bootstrapping problems when building
clang on head between r239347 and r245428.

The former revision introduced CLOCK_PROCESS_CPUTIME_ID as a clock id
for the clock_gettime() function and friends, but it was only added in
<sys/time.h>, not in <time.h>.  Any program including <time.h> would
therefore not be able to use CLOCK_PROCESS_CPUTIME_ID, even though the
value of _POSIX_CPUTIME indicates its existence.  The latter revision
synchronized the defines again.

Work around this problem by defining the id on the command line for the
particular .cpp file that needs it.  If the id ever changes value, this
hack will need to be updated.