BUG: fix rcon_crypt for any size of time_t

[VVD]

ezQuake version:
3.2.3

Describe the bug

time(&client_time);

time want time_t, if time_t == int128_t and we try to call it with pointer to 64bit => segmentation fault and/or broken stack.
So always use time_t and fixed size (32 or 64 bit) for hex in rcon is better way.
ezQuake with this patch work for me with current mvdsv without any changes:

--- common.h.orig
+++ common.h
@@ -436,5 +436,7 @@
 unsigned char *Q_redtext(unsigned char *str);
 unsigned char *Q_yelltext(unsigned char *str);
 
+#define TIME_T_SIZE    8
+
 #endif /* !__COMMON_H__ */
 
--- cl_cmd.c.orig
+++ cl_cmd.c
@@ -84,7 +84,7 @@
 // don't forward the first argument
 void CL_ForwardToServer_f (void) {
 // Added by VVD {
-       char            *server_string, client_time_str[9];
+       char            *server_string, client_time_str[TIME_T_SIZE * 2 + 1];
        int             i, server_string_len;
        extern cvar_t   cl_crypt_rcon;
        time_t          client_time;
@@ -131,13 +131,13 @@
                if (cl_crypt_rcon.value && strcasecmp(Cmd_Argv(1), "techlogin") == 0 && Cmd_Argc() > 2)
                {
                        time(&client_time);
-                       for (client_time_str[0] = i = 0; i < sizeof(client_time); i++) {
+                       for (client_time_str[0] = i = 0; i < TIME_T_SIZE; i++) {
                                char tmp[3];
                                snprintf(tmp, sizeof(tmp), "%02X", (unsigned int)((client_time >> (i * 8)) & 0xFF));
                                strlcat(client_time_str, tmp, sizeof(client_time_str));
                        }
 
-                       server_string_len = Cmd_Argc() + strlen(Cmd_Argv(1)) + DIGEST_SIZE * 2 + 16;
+                       server_string_len = Cmd_Argc() + strlen(Cmd_Argv(1)) + DIGEST_SIZE * 2 + TIME_T_SIZE * 2;
                        for (i = 3; i < Cmd_Argc(); ++i)
                                server_string_len += strlen(Cmd_Argv(i));
                        server_string = (char *) Q_malloc(server_string_len);
@@ -548,7 +548,7 @@
 //Send the rest of the command line over as an unconnected command.
 void CL_Rcon_f (void) {
 
-       char    message[1024], client_time_str[9];
+       char    message[1024], client_time_str[TIME_T_SIZE * 2 + 1];
        int             i, i_from;
        netadr_t        to;
        extern cvar_t   rcon_password, rcon_address, cl_crypt_rcon;
@@ -565,7 +565,7 @@
        if (cl_crypt_rcon.value)
        {
                time(&client_time);
-               for (client_time_str[0] = i = 0; i < sizeof(client_time); i++) {
+               for (client_time_str[0] = i = 0; i < TIME_T_SIZE; i++) {
                        char tmp[3];
                        snprintf(tmp, sizeof(tmp), "%02X", (unsigned int)((client_time >> (i * 8)) & 0xFF));
                        strlcat(client_time_str, tmp, sizeof(client_time_str));
--- sv_main.c.orig
+++ sv_main.c
@@ -1499,7 +1499,7 @@
 
        if ((int)sv_crypt_rcon.value) {
                time(&server_time);
-               for (i = 0; i < sizeof(client_time) * 2; i += 2) {
-                        client_time += ((time_t)char2int((unsigned char)(Cmd_Argv(1) + DIGEST_SIZE * 2)[i]) << (4 + i * 4)) +
-                                       ((time_t)char2int((unsigned char)(Cmd_Argv(1) + DIGEST_SIZE * 2)[i + 1]) << (i * 4));
+               for (i = 0; i < TIME_T_SIZE * 2; i += 2) {
+                        client_time += ((time_t)char2int((unsigned char)(Cmd_Argv(1) + DIGEST_SIZE * 2)[i]) << (4 + i * 4)) +
+                                       ((time_t)char2int((unsigned char)(Cmd_Argv(1) + DIGEST_SIZE * 2)[i + 1]) << (i * 4));
                }