1.3.1 - New function + example, minor bugfix
New function getServerCapabilities() actively queries a media server for it's UPnP content search/sort capabilities.
New example GetServerCapabilities_WiFi.ino makes use of it and log file GetServerCapabilities_WiFi_2-Warning.log shows the capabilities of a few real world media servers.
Bugfix in file SoapESP32.cpp, lines 986-988. Previous versions forgot to close the socket in this very rare error situation.