2208 merge dnssd

[aleks-f]

replaces #4323

[soroshsabz]

fixes #2208

[matejk]

DNSSD does not compile on macOS with XCode and MacOSX14.4.sdk:

FindBounjour.cmake does not set library and include variables on Apple platforms.

After fixing that (DNSSD is a part of CoreServices, no additional include directory required) compile fails because enum value kDNSServiceFlagsNonBrowsable is not defined in Apple's dns_sd.h.

/Users/matejk/git/github/poco/DNSSD/Bonjour/src/BonjourResponderImpl.cpp:83:60: error: use of undeclared identifier 'kDNSServiceFlagsNonBrowsable'; did you mean 'kDNSServiceFlagsNoAutoRename'?
        if (options & DNSSDResponder::REG_NON_BROWSABLE) flags |= kDNSServiceFlagsNonBrowsable;
                                                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                                                  kDNSServiceFlagsNoAutoRename
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.4.sdk/usr/include/dns_sd.h:286:5: note: 'kDNSServiceFlagsNoAutoRename' declared here
    kDNSServiceFlagsNoAutoRename        = 0x8,
    ^

It was removed in version 1096.0.2 (January 2020).

Older versions of dns_sd.h from (https://github.com/apple-oss-distributions/mDNSResponder) still have this value.

    kDNSServiceFlagsNonBrowsable        = 0x2000,
    /* A service registered with the NonBrowsable flag set can be resolved using
     * DNSServiceResolve(), but will not be discoverable using DNSServiceBrowse().
     * This is for cases where the name is actually a GUID; it is found by other means;
     * there is no end-user benefit to browsing to find a long list of opaque GUIDs.
     * Using the NonBrowsable flag creates SRV+TXT without the cost of also advertising
     * an associated PTR record.
     */

[soroshsabz]

@aleks-f @matejk

Thanks a lot :)