merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 8 insertions, 0 deletions

diff --git a/third_party/git/trace2/tr2_cfg.h b/third_party/git/trace2/tr2_cfg.h
index d9c98f64ddf2..a11d71feb5bf 100644
--- a/third_party/git/trace2/tr2_cfg.h
+++ b/third_party/git/trace2/tr2_cfg.h
@@ -8,6 +8,12 @@
 void tr2_cfg_list_config_fl(const char *file, int line);
 
 /*
+ * Iterate over all "interesting" environment variables and emit 'def_param'
+ * events for them to TRACE2.
+ */
+void tr2_list_env_vars_fl(const char *file, int line);
+
+/*
  * Emit a "def_param" event for the given key/value pair IF we consider
  * the key to be "interesting".
  */
@@ -16,4 +22,6 @@ void tr2_cfg_set_fl(const char *file, int line, const char *key,
 
 void tr2_cfg_free_patterns(void);
 
+void tr2_cfg_free_env_vars(void);
+
 #endif /* TR2_CFG_H */