This starts using the "user.name" and "user.email" config variables if
they exist as the default name and email when committing.  This means
that you don't have to use the GIT_COMMITTER_EMAIL environment variable
to override your email - you can just edit the config file instead.

The patch looks bigger than it is because it makes the default name and
email information non-static and renames it appropriately.  And it moves
the common git environment variables into a new library file, so that
you can link against libgit.a and get the git environment without having
to link in zlib and libcrypt.

In short, most of it is renaming and moving, the real change core is
just a few new lines in "git_default_config()" that copies the user
config values to the new base.

It also changes "git-var -l" to list the config variables.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This updates the default human readable name we generate from GECOS
field.  We assume the "full-name, followed by additional information
separated by commas" format, with an & expanding to the capitalized
login name.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Jason Riedy suggests that we should be able to use getdomainname
if we properly specify which libraries to link.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

We have deprecated the old environment variable names for quite a
while and now it's time to remove them.  Gone are:

    SHA1_FILE_DIRECTORIES AUTHOR_DATE AUTHOR_EMAIL AUTHOR_NAME
    COMMIT_AUTHOR_EMAIL COMMIT_AUTHOR_NAME SHA1_FILE_DIRECTORY
Signed-off-by: NJunio C Hamano <junkio@cox.net>

 * getdomainname unavailable there.
 * needs -lsocket for linkage.
 * needs __EXTENSIONS__ at the beginning of convert-objects.c

[JC: I've done this slightly differently from what Patrick originally
sent to the list and dropped the bit that deals with installations
that has curl header and library at non-default location.  I am
resisting the slipperly slope called autoconf.]
Signed-off-by: NJunio C Hamano <junkio@cox.net>

The only use of C99 array initializers is in ident.c, so
just replace it with initializing code.
Signed-off-by: NJason Riedy <ejr@cs.berkeley.edu>

If your user name is too long it is your sysadmin who
hates you not your parents!
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>

[ Fixed grammar ]
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Moving these functions allows all of the logic for figuring out what
these values are to be shared between programs.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

We'll want to use it for the tagging too.