net/echoping: fix build with -fno-common (clang 11 and gcc 10)

PORTREVISION not bumped as it fixes build for FreeBSD 13.

Reported by:	pkg-fallout

net/echoping/files/patch-echoping.c

@@ -0,0 +1,25 @@
+--- echoping.c.orig	2020-08-20 15:47:00 UTC
++++ echoping.c
+@@ -38,6 +38,22 @@ struct result   results[MAX_ITERATIONS];
+ struct timeval  good_results[MAX_ITERATIONS];
+ extern int      tvcmp();
+ 
++boolean timeout_flag;
++static char *server;
++#ifdef LIBIDN
++static char *locale_server, *ace_server, *utf8_server;
++#endif
++
++static init_f plugin_init;
++static start_f plugin_start;
++static start_raw_f plugin_raw_start;
++static execute_f plugin_execute;
++static execute_f plugin_execute;
++static terminate_f plugin_terminate;
++
++struct timeval null_timeval;
++static struct timeval max_timeval;
++
+ int
+ main(argc, argv)
+     int             argc;

net/echoping/files/patch-echoping.h

@@ -0,0 +1,45 @@
+--- echoping.h.orig	2020-08-20 15:39:43 UTC
++++ echoping.h
+@@ -121,7 +121,6 @@ struct result
+   struct timeval timevalue;
+ };
+ 
+-boolean timeout_flag;
+ struct echoping_struct
+ {
+   boolean udp;			/* Use the UDP protocol (TCP is the default) */
+@@ -136,21 +135,15 @@ typedef struct echoping_struct echoping_options;
+ /* Initializes the plugin with its arguments. Returns the port name or number or NULL if the plugin wants to use the raw interface. */
+ typedef char *(*init_f) (const int argc, const char **argv,
+ 			 const echoping_options global_options);
+-init_f plugin_init;
+ typedef void (*start_f) (struct addrinfo *);
+-start_f plugin_start;
+ typedef void (*start_raw_f) ();
+-start_raw_f plugin_raw_start;
+ typedef int (*execute_f) ();
+-execute_f plugin_execute;
+ typedef void (*terminate_f) ();
+-terminate_f plugin_terminate;
+ #endif
+ 
+ #endif
+ 
+-struct timeval null_timeval;
+-struct timeval max_timeval;
++extern struct timeval null_timeval;
+ 
+ #define	ECHO_TCP_PORT	"echo"
+ #define	DISCARD_TCP_PORT	"discard"
+@@ -172,11 +165,6 @@ struct timeval max_timeval;
+ #define USE_SMTP        6
+ 
+ #define CHARGENERATED " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefg";
+-
+-char *server;
+-#ifdef LIBIDN
+-char *locale_server, *ace_server, *utf8_server;
+-#endif
+ 
+ /* My functions */
+ 

net/echoping/files/patch-http.c

@@ -1,6 +1,15 @@
---- http.c.orig	2015-06-03 13:06:16 UTC
+--- http.c.orig	2019-12-29 10:14:41 UTC
 +++ http.c
-@@ -113,6 +113,8 @@ read_from_server(CHANNEL fs, short ssl, 
+@@ -6,7 +6,7 @@
+ #include "HTParse.h"
+ 
+ 
+-char            big_recvline[MAXTOREAD];
++static char	big_recvline[MAXTOREAD];
+ 
+ char           *
+ make_http_sendline(char *url, char *host, int port, int nocache)
+@@ -113,6 +113,8 @@ read_from_server(CHANNEL fs, short ssl, boolean accept
              /* 204 No Content is not an error, message body is empty by definition, see RFC 2616 */
              if (reply_code == 204)
                  return 0;       /* zero bytes is correct */

net/echoping/files/patch-smtp.c

@@ -0,0 +1,11 @@
+--- smtp.c.orig	2019-12-29 10:14:41 UTC
++++ smtp.c
+@@ -8,7 +8,7 @@
+ 
+ #ifdef SMTP
+ 
+-char            big_recvline[MAXTOREAD];
++static char	big_recvline[MAXTOREAD];
+ 
+ int
+ smtp_read_response_from_server(FILE * fs)