Implement AcceptParentDomainCookies API

Spec : https://docs.google.com/document/d/1tyShUOgYB4D25GX__X73gnBb782ZV3tanIJgeeySTzA

• @param db The C4Databaser instance.
• @param setCookieHeader The "Set-Cookie" header.
• @param fromHost The host address of the request.
• @param fromPath The path of the request.
• @param acceptParentDomain Whether to allow the "Domain" property of the cookie to be a parent domain of the host address. It should match the option, kC4ReplicatorOptionAcceptParentDomainCookies, in C4ReplicatorParameters.
• @param outError Records error information, if any.
• @return true if the cookie is successfully saved..
  */
  CBL_CORE_API bool c4db_setCookie(C4Database *db,
  C4String setCookieHeader,
  C4String fromHost,
  C4String fromPath,
  bool acceptParentDomain,
  C4Error* C4NULLABLE outError) C4API;