Use system property to set dns cache size

Use system property ro.net.dns_cache_size to set
the size of the cache. If the system property
is not set the default cache size is defined by
CONFIG_MAX_ENTRIES.

The number of entries in the hash table will be equal
to the number of max entries allowed in the cache.

Change-Id: I77d69d7c178937fa483d0b40512483ad29232d28
1 file changed