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/krb5/krb5_common.c b/src/providers/krb5/krb5_common.c
index 06c3cbac6..6e190d0c5 100644
--- a/src/providers/krb5/krb5_common.c
+++ b/src/providers/krb5/krb5_common.c
@@ -367,7 +367,7 @@ done:
 static void krb5_resolve_callback(void *private_data, struct fo_server *server)
 {
     struct krb5_service *krb5_service;
-    struct hostent *srvaddr;
+    struct resolv_hostent *srvaddr;
     char *address;
     int ret;