[PATCH v4 2/5] docs: expand on possible and recommended user config options

["brian m. carlson" <sandals@crustytoothpaste.net>]

In the section on setting author and committer information, we omit the
author.* and committer.* variables, so mention them for completeness.
In addition, guide users to the typical case: simply setting user.name
and user.email, which are recommended if one does not need complex
configuration.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
---
 Documentation/git-commit.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/git-commit.txt b/Documentation/git-commit.txt
index 30c30ccd80..7b61c9ba79 100644
--- a/Documentation/git-commit.txt
+++ b/Documentation/git-commit.txt
@@ -482,6 +482,13 @@ system user name and the hostname used for outgoing mail (taken
 from `/etc/mailname` and falling back to the fully qualified hostname when
 that file does not exist).
 
+The `author.name` and `committer.name` and their corresponding email options
+override `user.name` and `user.email` if set and are overridden themselves by
+the environment variables.
+
+The typical usage is to set just the `user.name` and `user.email` variables;
+the other options are provided for more complex use cases.
+
 :git-commit: 1
 include::date-formats.txt[]