intermediate commit
missing
missing license in header
profile / trace at runtime
Merge branch 'master' into smtpctl_trace
document trace and profile
- fix bytes_queued counting
- report the highest value for bytes_queued since the last update, rather
  than the current value.
- make mproc_enable/disable only affect input, not output.
parser name collision ...
Merge branch 'master' into smtpctl_trace
- move extern ints to smtpd.h
- fix warnings
fix missing cases in switch used to output imsg names