[master] fix dyndb issues; isc_errno_toresult()

4445.	[cleanup]	isc_errno_toresult() can now be used to call the
			formerly private function isc__errno2result().
			[RT #43050]

4444.	[bug]		Fixed some issues related to dyndb: A bug caused
			braces to be omitted when passing configuration text
			from named.conf to a dyndb driver, and there was a
			use-after-free in the sample dyndb driver. [RT #43050]

Patch for dyndb driver submitted by Petr Spacek at Red Hat.

lib/isc/tests/errno_test.c

@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2016  Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <sys/errno.h>
+
+#include <atf-c.h>
+
+#include <isc/errno.h>
+#include <isc/result.h>
+
+typedef struct {
+	int err;
+	isc_result_t result;
+} testpair_t;
+
+testpair_t testpair[] = {
+	{ EPERM, ISC_R_NOPERM },
+	{ ENOENT, ISC_R_FILENOTFOUND },
+	{ EIO, ISC_R_IOERROR },
+	{ EBADF, ISC_R_INVALIDFILE },
+	{ ENOMEM, ISC_R_NOMEMORY },
+	{ EACCES, ISC_R_NOPERM },
+	{ EEXIST, ISC_R_FILEEXISTS },
+	{ ENOTDIR, ISC_R_INVALIDFILE },
+	{ EINVAL, ISC_R_INVALIDFILE },
+	{ ENFILE, ISC_R_TOOMANYOPENFILES },
+	{ EMFILE, ISC_R_TOOMANYOPENFILES },
+	{ EPIPE, ISC_R_CONNECTIONRESET },
+	{ ENAMETOOLONG, ISC_R_INVALIDFILE },
+	{ ELOOP, ISC_R_INVALIDFILE },
+#ifdef EOVERFLOW
+	{ EOVERFLOW, ISC_R_RANGE },
+#endif
+#ifdef EAFNOSUPPORT
+	{ EAFNOSUPPORT, ISC_R_FAMILYNOSUPPORT },
+#endif
+#ifdef EADDRINUSE
+	{ EADDRINUSE, ISC_R_ADDRINUSE },
+#endif
+	{ EADDRNOTAVAIL, ISC_R_ADDRNOTAVAIL },
+#ifdef ENETDOWN
+	{ ENETDOWN, ISC_R_NETDOWN },
+#endif
+#ifdef ENETUNREACH
+	{ ENETUNREACH, ISC_R_NETUNREACH },
+#endif
+#ifdef ECONNABORTED
+	{ ECONNABORTED, ISC_R_CONNECTIONRESET },
+#endif
+#ifdef ECONNRESET
+	{ ECONNRESET, ISC_R_CONNECTIONRESET },
+#endif
+#ifdef ENOBUFS
+	{ ENOBUFS, ISC_R_NORESOURCES },
+#endif
+#ifdef ENOTCONN
+	{ ENOTCONN, ISC_R_NOTCONNECTED },
+#endif
+#ifdef ETIMEDOUT
+	{ ETIMEDOUT, ISC_R_TIMEDOUT },
+#endif
+	{ ECONNREFUSED, ISC_R_CONNREFUSED },
+#ifdef EHOSTDOWN
+	{ EHOSTDOWN, ISC_R_HOSTDOWN },
+#endif
+#ifdef EHOSTUNREACH
+	{ EHOSTUNREACH, ISC_R_HOSTUNREACH },
+#endif
+	{ 0, ISC_R_UNEXPECTED }
+};
+
+ATF_TC(isc_errno_toresult);
+ATF_TC_HEAD(isc_errno_toresult, tc) {
+	atf_tc_set_md_var(tc, "descr", "convert errno to ISC result");
+}
+ATF_TC_BODY(isc_errno_toresult, tc) {
+	isc_result_t result, expect;
+	size_t i;
+
+	for (i = 0; i < sizeof(testpair)/sizeof(testpair[0]); i++) {
+		result = isc_errno_toresult(testpair[i].err);
+		expect = testpair[i].result;
+		ATF_CHECK(result == expect);
+	}
+}
+
+/*
+ * Main
+ */
+ATF_TP_ADD_TCS(tp) {
+	ATF_TP_ADD_TC(tp, isc_errno_toresult);
+	return (atf_no_error());
+}
+