MINOR: log: use conn->{src,dst} instead of conn->addr.{from,to}

This is used to retrieve the addresses to be logged (client, frontend,
backend, server). In all places the validity check was already performed.
diff --git a/src/log.c b/src/log.c
index ff637dd..ed45a73 100644
--- a/src/log.c
+++ b/src/log.c
@@ -2022,7 +2022,7 @@
 			case LOG_FMT_CLIENTIP:  // %ci
 				conn = objt_conn(sess->origin);
 				if (conn && conn_get_src(conn))
-					ret = lf_ip(tmplog, (struct sockaddr *)&conn->addr.from, dst + maxsize - tmplog, tmp);
+					ret = lf_ip(tmplog, (struct sockaddr *)conn->src, dst + maxsize - tmplog, tmp);
 				else
 					ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
 				if (ret == NULL)
@@ -2034,10 +2034,10 @@
 			case LOG_FMT_CLIENTPORT:  // %cp
 				conn = objt_conn(sess->origin);
 				if (conn && conn_get_src(conn)) {
-					if (conn->addr.from.ss_family == AF_UNIX) {
+					if (conn->src->ss_family == AF_UNIX) {
 						ret = ltoa_o(sess->listener->luid, tmplog, dst + maxsize - tmplog);
 					} else {
-						ret = lf_port(tmplog, (struct sockaddr *)&conn->addr.from,
+						ret = lf_port(tmplog, (struct sockaddr *)conn->src,
 						              dst + maxsize - tmplog, tmp);
 					}
 				}
@@ -2053,7 +2053,7 @@
 			case LOG_FMT_FRONTENDIP: // %fi
 				conn = objt_conn(sess->origin);
 				if (conn && conn_get_dst(conn)) {
-					ret = lf_ip(tmplog, (struct sockaddr *)&conn->addr.to, dst + maxsize - tmplog, tmp);
+					ret = lf_ip(tmplog, (struct sockaddr *)conn->dst, dst + maxsize - tmplog, tmp);
 				}
 				else
 					ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
@@ -2067,10 +2067,10 @@
 			case  LOG_FMT_FRONTENDPORT: // %fp
 				conn = objt_conn(sess->origin);
 				if (conn && conn_get_dst(conn)) {
-					if (conn->addr.to.ss_family == AF_UNIX)
+					if (conn->dst->ss_family == AF_UNIX)
 						ret = ltoa_o(sess->listener->luid, tmplog, dst + maxsize - tmplog);
 					else
-						ret = lf_port(tmplog, (struct sockaddr *)&conn->addr.to, dst + maxsize - tmplog, tmp);
+						ret = lf_port(tmplog, (struct sockaddr *)conn->dst, dst + maxsize - tmplog, tmp);
 				}
 				else
 					ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
@@ -2083,7 +2083,7 @@
 
 			case LOG_FMT_BACKENDIP:  // %bi
 				if (be_conn && conn_get_src(be_conn))
-					ret = lf_ip(tmplog, (const struct sockaddr *)&be_conn->addr.from, dst + maxsize - tmplog, tmp);
+					ret = lf_ip(tmplog, (const struct sockaddr *)be_conn->src, dst + maxsize - tmplog, tmp);
 				else
 					ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
 
@@ -2095,7 +2095,7 @@
 
 			case LOG_FMT_BACKENDPORT:  // %bp
 				if (be_conn && conn_get_src(be_conn))
-					ret = lf_port(tmplog, (struct sockaddr *)&be_conn->addr.from, dst + maxsize - tmplog, tmp);
+					ret = lf_port(tmplog, (struct sockaddr *)be_conn->src, dst + maxsize - tmplog, tmp);
 				else
 					ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
 
@@ -2107,7 +2107,7 @@
 
 			case LOG_FMT_SERVERIP: // %si
 				if (be_conn && conn_get_dst(be_conn))
-					ret = lf_ip(tmplog, (struct sockaddr *)&be_conn->addr.to, dst + maxsize - tmplog, tmp);
+					ret = lf_ip(tmplog, (struct sockaddr *)be_conn->dst, dst + maxsize - tmplog, tmp);
 				else
 					ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
 
@@ -2119,7 +2119,7 @@
 
 			case LOG_FMT_SERVERPORT: // %sp
 				if (be_conn && conn_get_dst(be_conn))
-					ret = lf_port(tmplog, (struct sockaddr *)&be_conn->addr.to, dst + maxsize - tmplog, tmp);
+					ret = lf_port(tmplog, (struct sockaddr *)be_conn->dst, dst + maxsize - tmplog, tmp);
 				else
 					ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);