[PATCH] Document git aliases support

[Petr Baudis <pasky@suse.cz>]

This patch ports and modifies appropriately the git aliases documentation
from my patch, shall it rest in peace.

Signed-off-by: Petr Baudis <pasky@suse.cz>
---

 Documentation/config.txt |    7 +++++++
 Documentation/git.txt    |    3 +++
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/Documentation/config.txt b/Documentation/config.txt
index c861c6c..ad9ec3e 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -91,6 +91,13 @@ core.warnAmbiguousRefs::
 	If true, git will warn you if the ref name you passed it is ambiguous
 	and might match multiple refs in the .git/refs/ tree. True by default.
 
+alias.*::
+	Command aliases for the gitlink:git[1] command wrapper - e.g.
+	after defining "alias.last = cat-file commit HEAD", the invocation
+	"git last" is equivalent to "git cat-file commit HEAD". You cannot
+	override even existing command names with aliases. Arguments are
+	split by spaces, the usual shell quoting and escaping is supported.
+
 apply.whitespace::
 	Tells `git-apply` how to handle whitespaces, in the same way
 	as the '--whitespace' option. See gitlink:git-apply[1].
diff --git a/Documentation/git.txt b/Documentation/git.txt
index 24ca55d..e474bdf 100644
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -21,6 +21,9 @@ link:everyday.html[Everyday Git] for a u
 "man git-commandname" for documentation of each command.  CVS users may
 also want to read link:cvs-migration.html[CVS migration].
 
+The COMMAND is either a name of a Git command (see below) or an alias
+as defined in the configuration file (see gitlink:git-repo-config[1]).
+
 OPTIONS
 -------
 --version::