Newlines / Carriage in header values violate HTTP header spec. Will break HTTP/2 #565
Description
With headers such as CSP, they tend to be long and hence people naturally break them over multiple lines in config. That then breaks the service as headers with newline/carriage return violate HTTP spec. Seems especially troublesome in HTTP/2.
Attached patch will sanitize the headers and remove the offending characters.
(Sorry about the patchfile, didn't have permissions to create a branch and PR etc. The fix is very simple however.)