Added new function config_address2addrinfo

This function takes an "Address" config string, splits it into
address and port, then calls str2addinfo() on it returning addrinfo.

The aim is to refactor the code an allow simple translation
of addresses listed in configuration or generated on demand
in other places in the code.

src/netutl.c

@@ -54,6 +54,25 @@ struct addrinfo *str2addrinfo(const char *address, const char *service, int sock
 	return ai;
 }
 
+/*
+  Turn a configuration Address string into addrinfo.
+*/
+struct addrinfo *config_address2addrinfo(char *address, int socktype) {
+	struct addrinfo *ai;
+	char *space, *port;
+	space = strchr(address, ' ');
+	if(space) {
+		port = xstrdup(space + 1);
+		*space = 0;
+	} else
+			port = xstrdup("655");
+
+	ai = str2addrinfo(address, port, socktype);
+	free(port);
+
+	return ai;
+}
+
 sockaddr_t str2sockaddr(const char *address, const char *port) {
 	struct addrinfo *ai, hint;
 	sockaddr_t result;

src/netutl.h

@@ -26,6 +26,7 @@
 extern bool hostnames;
 
 extern struct addrinfo *str2addrinfo(const char *, const char *, int) __attribute__ ((__malloc__));
+extern struct addrinfo *config_address2addrinfo(char *, int);
 extern sockaddr_t str2sockaddr(const char *, const char *);
 extern void sockaddr2str(const sockaddr_t *, char **, char **);
 extern char *sockaddr2hostname(const sockaddr_t *) __attribute__ ((__malloc__));