Call avformat_network_init/deinit in the programs

Calling the init function will become mandatory at some later
point. By calling it, more heavy network init (such as SSL/TLS
library init) can be done once at startup, instead of implicitly
when used (which could lead to it being done a number of times).

Signed-off-by: Martin Storsjö <martin@martin.st>

avprobe.c

@@ -399,6 +399,7 @@ int main(int argc, char **argv)
 
     parse_loglevel(argc, argv, options);
     av_register_all();
+    avformat_network_init();
     init_opts();
 #if CONFIG_AVDEVICE
     avdevice_register_all();
@@ -416,5 +417,7 @@ int main(int argc, char **argv)
 
     ret = probe_file(input_filename);
 
+    avformat_network_deinit();
+
     return ret;
 }