MINOR: http: optimize capture.req.method and capture.req.uri

Useless strncpy were done in those two sample fetches, the
"struct chunk" allows us to dump the specified len.

The encode_string() in capture.req.uri was judged inappropriate and was
deleted.

The return type was fixed to SMP_T_CSTR.
diff --git a/src/proto_http.c b/src/proto_http.c
index 211a37a..6c4ba7a 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -9778,26 +9778,21 @@
 {
 	struct chunk *temp;
 	struct http_txn *txn = l7;
-	char *spc;
-	int len;
+	char *ptr;
 
 	if (!txn->uri)
 		return 0;
 
-	spc = strchr(txn->uri, ' '); /* first space before URI */
-	if (likely(spc))
-		len = spc - txn->uri;
-	else
-		len = strlen(txn->uri);
+	ptr = txn->uri;
 
-	temp = get_trash_chunk();
-	len = MIN(len, temp->size - 1);
-	strncpy(temp->str, txn->uri, len);
-	temp->str[len] = '\0';
+	while (*ptr != ' ' && *ptr != '\0')  /* find first space */
+		ptr++;
 
+	temp = get_trash_chunk();
+	temp->str = txn->uri;
+	temp->len = ptr - txn->uri;
 	smp->data.str = *temp;
-	smp->data.str.len = len;
-	smp->type = SMP_T_STR;
+	smp->type = SMP_T_CSTR;
 
 	return 1;
 
@@ -9811,33 +9806,30 @@
 	struct chunk *temp;
 	struct http_txn *txn = l7;
 	char *ptr;
-	char *ret;
 
 	if (!txn->uri)
 		return 0;
+
 	ptr = txn->uri;
 
 	while (*ptr != ' ' && *ptr != '\0')  /* find first space */
 		ptr++;
+
 	if (!*ptr)
 		return 0;
 
 	ptr++;  /* skip the space */
 
 	temp = get_trash_chunk();
-	ret = encode_string(temp->str, temp->str + temp->size, '#', url_encode_map, ptr);
-	if (ret == NULL || *ret != '\0')
-		return 0;
-	ptr = temp->str = http_get_path_from_string(temp->str);
+	ptr = temp->str = http_get_path_from_string(ptr);
 	if (!ptr)
 		return 0;
 	while (*ptr != ' ' && *ptr != '\0')  /* find space after URI */
 		ptr++;
-	*ptr = '\0';
 
 	smp->data.str = *temp;
-	smp->data.str.len = strlen(smp->data.str.str);
-	smp->type = SMP_T_STR;
+	smp->data.str.len = ptr - temp->str;
+	smp->type = SMP_T_CSTR;
 
 	return 1;
 }