* [SSDP] add `schema(Print &) const`
Supercedes #2806
Make SSDP::schema(WiFiClient&) use a by-ref (reduce stack use)
Add a SSDP::schema(Print&)
From @Palatis' original PR:
useful when using AsyncWebServer.
* Use ip.toString, only export Print& schema interface
Because WiFiClient inherits a Print interface, replace the
::schema(WiFiClient&) with ::schema(Print&) which is source compatible
with existing code and allows the functionality requested in the initial
PR.
Use ip.toString() in the templates instead of breaking up the octets of
the address.
* Fix compile errors and backwards compatibility
* Update ESP8266SSDP.h
Fix SSDP bug: The response to M-Search Packet with ST field set to UUID should be with the UUID not the Device Type
Integrated 'uuid:' prefix into the char array of the _uuid
* Update ESP8266SSDP.cpp
Fix SSDP bug: The response to M-Search Packet with ST field set to UUID should be with the UUID not the Device Type
Integrated 'uuid:' prefix into the char array of the _uuid
* include 'uuid:' in format String and in flash
* Update ESP8266SSDP.cpp
* Release referenced resources in destructor
* Release referenced resources in destructor, corrected for IPV6
* Release referenced resources in destructor, per suggested changes
* can now specify the TTL programmatically
* can now define the device type urn (up to 64 chars)
** still defaults to `Basic:1`
* can now set the serial number using a `uint32_t`, formatted as %08X
