zeroconf/glue: add fallback value for HOST_NAME_MAX
`HOST_NAME_MAX` is not a portable macro; it is undefined on some systems. Closes #402
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@ -32,6 +32,12 @@
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#include <unistd.h>
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#include <limits.h>
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#ifndef HOST_NAME_MAX
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/* HOST_NAME_MAX is not a portable macro; it is undefined on some
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systems */
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#define HOST_NAME_MAX 255
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#endif
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static constexpr Domain zeroconf_domain("zeroconf");
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/* The default service name to publish
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