Debug Level3 CDN using the (x-wr-diag) header

# CURL Example:

curl -I -X GET "https://example.com/ar?$RANDOM" -H "Host: example.com" -H "x-wr-diag: test,age,modes,host"

# Response Example:


HTTP/1.1 200 OK

Cache-Control: max-age=1800

Content-Type: text/html; charset=utf-8

Accept-Ranges: bytes

Server: Footprint Distributor V4.11

Vary: Accept-Encoding,User-Agent

Access-Control-Allow-Origin: https://example.com

grace: none

X-Cache: MISS

X-Cacheable: YES

X-Node-ID: Varnish 2

X-example: 8

X-ttl: 60.000

Date: Tue, 07 Nov 2017 11:32:17 GMT

X-WR-DIAG-MODES: ver=26,dis=17005,mig=98616,sub=4113,exp=+1800,reval=check_self,curl=/ar??31339

X-WR-DIAG: Host:17005 Type:TCP_MISS

Expires: Tue, 07 Nov 2017 12:02:17 GMT

Age: 0

Connection: close