BUILD: mux-fcgi: include proxy.h from mux-fcgi.c
proxy_capture_error() was called there without the include, which was
inherited via cfgparse.h.
diff --git a/src/mux_fcgi.c b/src/mux_fcgi.c
index 73165c2..c997c56 100644
--- a/src/mux_fcgi.c
+++ b/src/mux_fcgi.c
@@ -25,7 +25,7 @@
#include <haproxy/list.h>
#include <haproxy/log.h>
#include <haproxy/net_helper.h>
-#include <haproxy/proxy-t.h>
+#include <haproxy/proxy.h>
#include <haproxy/regex.h>
#include <haproxy/session-t.h>
#include <haproxy/ssl_sock.h>