Valid hostnames #19
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Valid hostnames #19
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Closes #18. Adds new utility methods:
bool isMDNS()- (deprecated)bool isMDNS(const char *hostName)- Returns true if hostname is a valid mDNS namebool isValidIP(const char * hostName- Returns true if hostName represents a valid IP address stringint labelCount(const char * hostName)- Integer of the number of labels in the hostnamebool isANumber(const char * str)- Returns true if string is a valid numberbool isValidLabel(const char *label)- Returns true if the string is a valid DNS labelbool isValidHostName(const char *hostName)- Return true if the hostname passed is a valid DNS, mDNS or IP hostname