MINOR: proxy: Make `header_unique_id` a `struct ist`
The `header_unique_id` member of `struct proxy` now is a `struct ist`.
diff --git a/include/types/proxy.h b/include/types/proxy.h
index f3b0e6b..b64d448 100644
--- a/include/types/proxy.h
+++ b/include/types/proxy.h
@@ -405,7 +405,7 @@
struct list logformat; /* log_format linked list */
struct list logformat_sd; /* log_format linked list for the RFC5424 structured-data part */
struct buffer log_tag; /* override default syslog tag */
- char *header_unique_id; /* unique-id header */
+ struct ist header_unique_id; /* unique-id header */
struct list format_unique_id; /* unique-id format */
int to_log; /* things to be logged (LW_*) */
int stop_time; /* date to stop listening, when stopping != 0 (int ticks) */