add CURLINFO_SCHEME, CURLINFO_PROTOCOL, and %{scheme}

Adds access to the effectively used protocol/scheme to both libcurl and
curl, both in string and numeric (CURLPROTO_*) form.

Note that the string form will be uppercase, as it is just the internal
string.

As these strings are declared internally as const, and all other strings
returned by curl_easy_getinfo() are de-facto const as well, string
handling in getinfo.c got const-ified.

Closes #1137

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/connect.c b/lib/connect.c
index 40252541f..c78d3da36 100644
--- a/lib/connect.c
+++ b/lib/connect.c
@@ -601,6 +601,8 @@ void Curl_persistconninfo(struct connectdata *conn)
 {
   memcpy(conn->data->info.conn_primary_ip, conn->primary_ip, MAX_IPADR_LEN);
   memcpy(conn->data->info.conn_local_ip, conn->local_ip, MAX_IPADR_LEN);
+  conn->data->info.conn_scheme = conn->handler->scheme;
+  conn->data->info.conn_protocol = conn->handler->protocol;
   conn->data->info.conn_primary_port = conn->primary_port;
   conn->data->info.conn_local_port = conn->local_port;
 }