Implement two new flags and a special req.http header to indicate errors

* NEWS: Document changes.
* doc/vmod-dbrw.3: Likewise.
* doc/vmod-dbrw.texi: Likewise.

* configure.ac: Version 2.4.90
* src/dbrw.h (dbrw_config): New member: match_type
* src/vmod_dbrw.c (parse_flags): Handle "eq" and "regex" flags.
(findmatch): Handle the "eq" flag.
(do_rewrite): Return error code.
(vmod_rewrite): Set the X-VMOD-DBRW-Error header on errors.

* tests/atlocal.in (at_vcl_backend): Special handling for
X-VMOD-DBRW-Error.
* tests/initdb.at: Test the 'eq' flag.
* tests/rewrite07.at: New testcase.
* tests/Makefile.am: Add new testcase.
* tests/testsuite.at: Likewise.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/dbrw.h b/src/dbrw.h
index bd0aa2a..9a8adf6 100644
--- a/src/dbrw.h
+++ b/src/dbrw.h
@@ -73,2 +73,3 @@ struct dbrw_config {
 	int regflags;
+	int match_type;
 	char status[HTTP_STATUS_LEN+1];