add documentation for -P

4 jobs for non-default-port in 1 minute and 17 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #67672
docker linux
build:centos:centos7:amd64

00:00:37

passed #67673
docker linux
build:debian:sid:amd64

00:00:37

 
  Test
passed #67674
docker linux
test:centos:centos7:amd64

00:00:39

passed #67675
docker linux
test:debian:sid:amd64

00:00:39