Honor the TTL value of SRV record lookups

Add new resolv_hostent data structure and utility functions

Resolve hosts by name from files into resolv_hostent

Resolve hosts by name from DNS into resolv_hostent

Switch resolver to using resolv_hostent and honor TTL

Conflicts:

	src/providers/fail_over.c

Provide TTL structure names for c-ares < 1.7

https://fedorahosted.org/sssd/ticket/898

In c-ares 1.7, the upstream renamed the addrttl/addr6ttl structures to
ares_addrttl/ares_addr6ttl so they are in the ares_ namespace.

Because they are committed to stable ABI, the contents are the same, just
the name changed -- so it is safe to just #define the new name for older
c-ares version in case the new one is not detected in configure time.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/providers/fail_over.h b/src/providers/fail_over.h
index 54141e9c8..e5d6c525f 100644
--- a/src/providers/fail_over.h
+++ b/src/providers/fail_over.h
@@ -169,7 +169,7 @@ int fo_get_server_port(struct fo_server *server);
 
 const char *fo_get_server_name(struct fo_server *server);
 
-struct hostent *fo_get_server_hostent(struct fo_server *server);
+struct resolv_hostent *fo_get_server_hostent(struct fo_server *server);
 
 time_t fo_get_server_hostname_last_change(struct fo_server *server);