tree 2ad4eeb3bbe72e7184ffd8afb818c19a40b6e837
parent 9e85443f0d04d9cff505b1808e151ab1e4220776
author nuccachen <nuccachen@google.com> 1543484472 +0800
committer Hungming Chen <nuccachen@google.com> 1544786672 +0800

Assign dns cache size without checking environment variable ANDROID_DNS_MODE

Since resolver functions have been moved from libc to libnetd_resolv, don't
need to determine if the caller is Netd via environment variable anymore.

Another reason is that if the caller sets dns server without setting
environment variable ANDROID_DNS_MODE with "local". The size of dns cache
will be set to 0. The zero size may cause unexpected hash table index in
_cache_lookup_p() because the index is counted by mod 0 (cache size).

Test: netd_{unit,integration}_test pass
      resolv_integration_test pass

Change-Id: I3988909ce2df6c26bdfa02c993bb7a1a97dc7950