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, 39 insertions, 32 deletions

diff --git a/third_party/git/Documentation/git-config.txt b/third_party/git/Documentation/git-config.txt
index ff9310f958..7573160f21 100644
--- a/third_party/git/Documentation/git-config.txt
+++ b/third_party/git/Documentation/git-config.txt
@@ -9,18 +9,18 @@ git-config - Get and set repository or global options
 SYNOPSIS
 --------
 [verse]
-'git config' [<file-option>] [--type=<type>] [--show-origin] [-z|--null] name [value [value_regex]]
+'git config' [<file-option>] [--type=<type>] [--show-origin] [--show-scope] [-z|--null] name [value [value_regex]]
 'git config' [<file-option>] [--type=<type>] --add name value
 'git config' [<file-option>] [--type=<type>] --replace-all name value [value_regex]
-'git config' [<file-option>] [--type=<type>] [--show-origin] [-z|--null] --get name [value_regex]
-'git config' [<file-option>] [--type=<type>] [--show-origin] [-z|--null] --get-all name [value_regex]
-'git config' [<file-option>] [--type=<type>] [--show-origin] [-z|--null] [--name-only] --get-regexp name_regex [value_regex]
+'git config' [<file-option>] [--type=<type>] [--show-origin] [--show-scope] [-z|--null] --get name [value_regex]
+'git config' [<file-option>] [--type=<type>] [--show-origin] [--show-scope] [-z|--null] --get-all name [value_regex]
+'git config' [<file-option>] [--type=<type>] [--show-origin] [--show-scope] [-z|--null] [--name-only] --get-regexp name_regex [value_regex]
 'git config' [<file-option>] [--type=<type>] [-z|--null] --get-urlmatch name URL
 'git config' [<file-option>] --unset name [value_regex]
 'git config' [<file-option>] --unset-all name [value_regex]
 'git config' [<file-option>] --rename-section old_name new_name
 'git config' [<file-option>] --remove-section name
-'git config' [<file-option>] [--show-origin] [-z|--null] [--name-only] -l | --list
+'git config' [<file-option>] [--show-origin] [--show-scope] [-z|--null] [--name-only] -l | --list
 'git config' [<file-option>] --get-color name [default]
 'git config' [<file-option>] --get-colorbool name [stdout-is-tty]
 'git config' [<file-option>] -e | --edit
@@ -222,6 +222,11 @@ Valid `<type>`'s include:
 	the actual origin (config file path, ref, or blob id if
 	applicable).
 
+--show-scope::
+	Similar to `--show-origin` in that it augments the output of
+	all queried config options with the scope of that value
+	(local, global, system, command).
+
 --get-colorbool name [stdout-is-tty]::
 
 	Find the color setting for `name` (e.g. `color.diff`) and output
@@ -339,33 +344,35 @@ EXAMPLES
 
 Given a .git/config like this:
 
-	#
-	# This is the config file, and
-	# a '#' or ';' character indicates
-	# a comment
-	#
-
-	; core variables
-	[core]
-		; Don't trust file modes
-		filemode = false
-
-	; Our diff algorithm
-	[diff]
-		external = /usr/local/bin/diff-wrapper
-		renames = true
-
-	; Proxy settings
-	[core]
-		gitproxy=proxy-command for kernel.org
-		gitproxy=default-proxy ; for all the rest
-
-	; HTTP
-	[http]
-		sslVerify
-	[http "https://weak.example.com"]
-		sslVerify = false
-		cookieFile = /tmp/cookie.txt
+------------
+#
+# This is the config file, and
+# a '#' or ';' character indicates
+# a comment
+#
+
+; core variables
+[core]
+	; Don't trust file modes
+	filemode = false
+
+; Our diff algorithm
+[diff]
+	external = /usr/local/bin/diff-wrapper
+	renames = true
+
+; Proxy settings
+[core]
+	gitproxy=proxy-command for kernel.org
+	gitproxy=default-proxy ; for all the rest
+
+; HTTP
+[http]
+	sslVerify
+[http "https://weak.example.com"]
+	sslVerify = false
+	cookieFile = /tmp/cookie.txt
+------------
 
 you can set the filemode to true with