DOC: config: fix error-log-format example

In commit 6f7497616 ("MEDIUM: connection: rename fc_conn_err and
bc_conn_err to fc_err and bc_err"), fc_conn_err became fc_err, so
update this example.

diff --git a/doc/configuration.txt b/doc/configuration.txt
index c810fa918f119720bc2386c48a92d2e43a3cd3ed..b1fbd6480e68a7821f19159f785f1a88d5f59783 100644 (file)
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -21409,7 +21409,7 @@ would have passed through a successful stream, hence will be available as
 regular traffic log (see option httplog or option httpslog).
 
    # detailed frontend connection error log
-   error-log-format "%ci:%cp [%tr] %ft %ac/%fc %[fc_conn_err]/\
+   error-log-format "%ci:%cp [%tr] %ft %ac/%fc %[fc_err]/\
          %[ssl_fc_err,hex]/%[ssl_c_err]/%[ssl_c_ca_err]/%[ssl_fc_is_resumed] \
          %[ssl_fc_sni]/%sslv/%sslc"