submodule.c: report the submodule that an error occurs in

diff --git a/Documentation/git.txt b/Documentation/git.txt
index 5446d2143857037bc376673e05a56a1f98ea5eb9..8163b5796b192ee5f5c0cb13fc85bdeff8202e64 100644 (file)
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -646,6 +646,10 @@ of clones and fetches.
        variable.
        See `GIT_TRACE` for available trace output options.
 
+`GIT_TRACE_CURL_NO_DATA`::
+       When a curl trace is enabled (see `GIT_TRACE_CURL` above), do not dump
+       data (that is, only dump info lines and headers).
+
 `GIT_REDACT_COOKIES`::
        This can be set to a comma-separated list of strings. When a curl trace
        is enabled (see `GIT_TRACE_CURL` above), whenever a "Cookies:" header