Added connection serial number in logging of left open sockets.

src/os/unix/ngx_process_cycle.c

diff --git a/src/os/unix/ngx_process_cycle.c b/src/os/unix/ngx_process_cycle.c
index 499039a..be55cea 100644
--- a/src/os/unix/ngx_process_cycle.c
+++ b/src/os/unix/ngx_process_cycle.c
@@ -1046,8 +1046,8 @@
                 && !c[i].read->resolver)
             {
                 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
-                              "open socket #%d left in connection %ui",
-                              c[i].fd, i);
+                              "*%uA open socket #%d left in connection %ui",
+                              c[i].number, c[i].fd, i);
                 ngx_debug_quit = 1;
             }
         }

src/os/win32/ngx_process_cycle.c

diff --git a/src/os/win32/ngx_process_cycle.c b/src/os/win32/ngx_process_cycle.c
index b5a1022..be8d9ac 100644
--- a/src/os/win32/ngx_process_cycle.c
+++ b/src/os/win32/ngx_process_cycle.c
@@ -881,8 +881,8 @@
                 && !c[i].read->resolver)
             {
                 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
-                              "open socket #%d left in connection %ui",
-                              c[i].fd, i);
+                              "*%uA open socket #%d left in connection %ui",
+                              c[i].number, c[i].fd, i);
             }
         }
     }