Fall back from --bind-dynamic to --bind-interfaces in BSD, rather than quitting.

src/dnsmasq.c

@@ -114,11 +114,16 @@ int main (int argc, char **argv)
       set_option_bool(OPT_NOWILD);
     }
 #  endif
-
+  
+  /* -- bind-dynamic not supported on !Linux, fall back to --bind-interfaces */
   if (option_bool(OPT_CLEVERBIND))
-    die(_("--bind-dynamic not available on this platform"), NULL, EC_BADCONF);
+    {
+      bind_fallback = 1;
+      set_option_bool(OPT_NOWILD);
+      reset_option_bool(OPT_CLVERBIND);
+    }
 #endif
-
+  
 #ifndef HAVE_TFTP
   if (daemon->tftp_unlimited || daemon->tftp_interfaces)
     die(_("TFTP server not available: set HAVE_TFTP in src/config.h"), NULL, EC_BADCONF);

src/dnsmasq.h

@@ -932,6 +932,7 @@ char *option_string(int prot, unsigned int opt, unsigned char *val,
 		    int opt_len, char *buf, int buf_len);
 void reread_dhcp(void);
 void set_option_bool(unsigned int opt);
+void reset_option_bool(unsigned int opt);
 struct hostsfile *expand_filelist(struct hostsfile *list);
 
 /* forward.c */

src/option.c

@@ -1119,6 +1119,14 @@ void set_option_bool(unsigned int opt)
     daemon->options2 |= 1u << (opt - 32);
 }
 
+void reset_option_bool(unsigned int opt)
+{
+  if (opt < 32)
+    daemon->options &= ~(1u << opt);
+  else
+    daemon->options2 &= ~(1u << (opt - 32));
+}
+
 static char *one_opt(int option, char *arg, char *gen_prob, int command_line)
 {      
   int i;