Fix implicit declaration of functions.
--- clients.c.orig	2008-11-18 14:35:19.000000000 -0600
+++ clients.c	2021-03-13 01:21:32.000000000 -0600
@@ -31,6 +31,7 @@
 
 /*******************************************************************/
 /* prototypes */
+void clean_exit(int signum);
 void dump_clients(void);
 void free_client( esd_client_t *client );
 
--- configure.orig	2008-11-18 14:54:39.000000000 -0600
+++ configure	2021-03-13 01:18:57.000000000 -0600
@@ -22731,6 +22731,7 @@
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 
+    #include<string.h>
     #include<sys/types.h>
     #include<sys/un.h>
 int