Ignore opts (#436)

* Be less strict about args at startup

Ignore unknown options.

* Don't fail if pid file is accessible

Author: stokito

common.c

@@ -853,19 +853,19 @@ void write_pid_file(const char* pidfile)
 
     f = fopen(pidfile, "w");
     if (!f) {
-        print_message(msg_system_error, "write_pid_file:%s:%s", pidfile, strerror(errno));
-        exit(3);
+        print_message(msg_system_error, "write_pid_file: %s: %s\n", pidfile, strerror(errno));
+        return;
     }
 
     res = fprintf(f, "%d\n", getpid());
     if (res < 0) {
-        print_message(msg_system_error, "write_pid_file:fprintf:%s", strerror(errno));
-        exit(3);
+        print_message(msg_system_error, "write_pid_file: fprintf: %s\n", strerror(errno));
+        return;
     }
 
     res = fclose(f);
     if (res == EOF) {
-        print_message(msg_system_error, "write_pid_file:fclose:%s", strerror(errno));
-        exit(3);
+        print_message(msg_system_error, "write_pid_file: fclose: %s\n", strerror(errno));
+        return;
     }
 }

sslh-conf.c

@@ -2239,10 +2239,13 @@ int sslhcfg_cl_parse(int argc, char* argv[], struct sslhcfg_item* cfg)
     /* Parse command line */
     nerrors = arg_parse(argc, argv, argtable);
     if (nerrors) {
-        arg_print_errors(stdout, sslhcfg_end, "sslhcfg"); 
+        // print bad args
+        arg_print_errors(stdout, sslhcfg_end, "sslhcfg");
+        // print usage
         arg_print_syntax(stdout, argtable, "\n");
+        // print options
         arg_print_glossary(stdout, argtable, "  %-25s\t%s\n");
-        return -1;
+        fprintf(stderr, "Invalid args are ignored, please fix them\n");
     }