* Takes the User-Agent header from a list.
* typo
* base
* Make defining User-agent header case insensitive #171
* -whitespaces
* Make canonical http headers and set default User-Agent only once.
* clean-up
* formatting, canonical customer headers, docs updated
* cleanup
* fmt
* Checking userdefined headers for excluding in canonicalization.
* resolving one conflict
* moved logic back and less resolve conflicts
Co-authored-by: Joona Hoikkala <joohoi@users.noreply.github.com>
