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/cfgparse.c b/src/cfgparse.c
index 40d20ab..7dda643 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -6601,7 +6601,7 @@
 			curproxy->conf.args.file = curproxy->conf.uif_file;
 			curproxy->conf.args.line = curproxy->conf.uif_line;
 			parse_logformat_string(curproxy->conf.uniqueid_format_string, curproxy, &curproxy->format_unique_id, LOG_OPT_HTTP,
-					       (proxy->cap & PR_CAP_FE) ? SMP_VAL_FE_HRQ_HDR : SMP_VAL_BE_HRQ_HDR,
+					       (curproxy->cap & PR_CAP_FE) ? SMP_VAL_FE_HRQ_HDR : SMP_VAL_BE_HRQ_HDR,
 					       curproxy->conf.uif_file, curproxy->conf.uif_line);
 			curproxy->conf.args.file = NULL;
 			curproxy->conf.args.line = 0;