Typo in alt-svc caching example

[rjb1000]

https://tools.ietf.org/html/draft-ietf-httpbis-alt-svc-08#section-3.1

For example, a response:

 HTTP/1.1 200 OK
 Content-Type: text/html
 Cache-Control: 600
 Age: 30
 Alt-Svc: h2c=":8000"; ma=60

Missing max-age= in Cache-Control header?

[reschke]

good catch