Assume always working getaddrinfo/getnameinfo implemenation

lib/irs/include/irs/netdb.h.in

@@ -17,24 +17,6 @@
 #include <stddef.h>	/* Required on FreeBSD (and  others?) for size_t. */
 #include <netdb.h>	/* Contractual provision. */
 
-/*
- * Define if <netdb.h> does not declare struct addrinfo.
- */
-@ISC_IRS_NEEDADDRINFO@
-
-#ifdef ISC_IRS_NEEDADDRINFO
-struct addrinfo {
-	int		ai_flags;      /* AI_PASSIVE, AI_CANONNAME */
-	int		ai_family;     /* PF_xxx */
-	int		ai_socktype;   /* SOCK_xxx */
-	int		ai_protocol;   /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
-	size_t		ai_addrlen;    /* Length of ai_addr */
-	char		*ai_canonname; /* Canonical name for hostname */
-	struct sockaddr	*ai_addr;      /* Binary address */
-	struct addrinfo	*ai_next;      /* Next structure in linked list */
-};
-#endif
-
 /*
  * Undefine all #defines we are interested in as <netdb.h> may or may not have
  * defined them.
@@ -187,17 +169,17 @@ getaddrinfo(const char *hostname, const char *servname,
 	    const struct addrinfo *hints, struct addrinfo **res);
 
 int
-getnameinfo(const struct sockaddr *sa, IRS_GETNAMEINFO_SOCKLEN_T salen,
-	    char *host, IRS_GETNAMEINFO_BUFLEN_T hostlen,
-	    char *serv, IRS_GETNAMEINFO_BUFLEN_T servlen,
-	    IRS_GETNAMEINFO_FLAGS_T flags);
+getnameinfo(const struct sockaddr *sa, socklen_t salen,
+	    char *host, socklen_t hostlen,
+	    char *serv, socklen_t servlen,
+	    int flags);
 
 void freeaddrinfo (struct addrinfo *ai);
 
-IRS_GAISTRERROR_RETURN_T
+const char *
 gai_strerror(int ecode);
 
-#endif
+#endif /* IRS_NAMESPACE */
 
 /*
  * Tell Emacs to use C mode on this file.