Fix the DNS_GETDB_STALEFIRST flag
The DNS_GETDB_STALEFIRST flag is defined as 0x0C, which is the combination of the DNS_GETDB_PARTIAL (0x04) and the DNS_GETDB_IGNOREACL (0x08) flags (0x04 | 0x08 == 0x0C) , which is an obvious error.
All the flags should be power of two, so they don't interfere with each other. Fix the DNS_GETDB_STALEFIRST flag by setting it to 0x10.