Fix requests to the webserver using IPv6 address http://[1234:1234::] requests.

The host portion contains ":" after split_port_part(), resulting in a 400
error.
Renaming is_legal_hostname() to is_legal_host(), since requests to webservers are to
"hosts" not "hostnames".
8 jobs for master in 0 seconds (queued for 89 minutes and 26 seconds)
Status Name Job ID Coverage
  Build
canceled build-sbbs #1028

failed build-sexpots #1029

failed build-syncterm #1027

failed build-sbbs #1025

failed build-sbbs #1016

failed build-sexpots #1026

failed build-sexpots #1017

failed build-syncterm #1018

 
Name Stage Failure
failed
build-sexpots Build There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job log
failed
build-syncterm Build There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job log