BUG/MINOR: parse: refer curproxy instead of proxy

Since during parsing stage, curproxy always represents a proxy to be operated,
it should be a mistake by referring proxy.

Signed-off-by: Godbach <nylzhaowei@gmail.com>
(cherry picked from commit d972203fbc3aab527cbd73ede70f9d9b35ecb809)
diff --git a/src/proto_http.c b/src/proto_http.c
index 44822e3..8264b73 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -9611,7 +9611,7 @@
 		 * if prefix == "/", we don't want to add anything, otherwise it
 		 * makes it hard for the user to configure a self-redirection.
 		 */
-		proxy->conf.args.ctx = ARGC_RDR;
+		curproxy->conf.args.ctx = ARGC_RDR;
 		if (!(type == REDIRECT_TYPE_PREFIX && destination[0] == '/' && destination[1] == '\0')) {
 			parse_logformat_string(destination, curproxy, &rule->rdr_fmt, LOG_OPT_HTTP,
 			                       (curproxy->cap & PR_CAP_FE) ? SMP_VAL_FE_HRQ_HDR : SMP_VAL_BE_HRQ_HDR,