IsMalformedForwardedFor checks whether the provided X-Forwarded-For string is malformed.

IsMalformedForwardedHost checks whether the provided X-Forwarded-Host string is malformed.

IsMalformedForwardedPort checks whether the provided X-Forwarded-Port string is malformed.

IsMalformedForwardedProto checks whether the provided X-Forwarded-Proto string is malformed.

IsMalformedRealIP checks whether the provided X-Real-IP string is malformed.