Extract any proxy url and port to be used by sockaddr if possible using extract_sockaddr.

miner.h

@@ -1183,6 +1183,9 @@ struct pool {
 	char *sockbuf;
 	size_t sockbuf_size;
 	char *sockaddr_url; /* stripped url used for sockaddr */
+	char *sockaddr_proxy_url;
+	char *sockaddr_proxy_port;
+
 	char *nonce1;
 	unsigned char *nonce1bin;
 	size_t n1_len;

util.c

@@ -567,6 +567,7 @@ char *get_proxy(char *url, struct pool *pool)
 				quithere(1, "Failed to malloc rpc_proxy");
 
 			strcpy(pool->rpc_proxy, url + plen);
+			extract_sockaddr(pool->rpc_proxy, &pool->sockaddr_proxy_url, &pool->sockaddr_proxy_port);
 			pool->rpc_proxytype = proxynames[i].proxytype;
 			url = split + 1;
 			break;