Documentation: add 'git-web--browse.txt' and simplify other docs.

'git-help.txt' and 'git-instaweb.txt' contained duplicated
information about 'git-web--browse'.

This patch puts this information where it belongs.
Signed-off-by: NChristian Couder <chriscool@tuxfamily.org>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Documentation/git-help.txt

@@ -48,26 +48,8 @@ OPTIONS
 The web browser can be specified using the configuration variable
 'help.browser', or 'web.browser' if the former is not set. If none of
 these config variables is set, the 'git-web--browse' helper script
-(called by 'git-help') will pick a suitable default.
-+
-You can explicitly provide a full path to your preferred browser by
-setting the configuration variable 'browser.<tool>.path'. For example,
-you can configure the absolute path to firefox by setting
-'browser.firefox.path'. Otherwise, 'git-web--browse' assumes the tool
-is available in PATH.
-+
-Note that the script tries, as much as possible, to display the HTML
-page in a new tab on an already opened browser.
-+
-The following browsers are currently supported by 'git-web--browse':
-+
-* firefox (this is the default under X Window when not using KDE)
-* iceweasel
-* konqueror (this is the default under KDE)
-* w3m (this is the default outside X Window)
-* links
-* lynx
-* dillo
+(called by 'git-help') will pick a suitable default. See
+linkgit:git-web--browse[1] for more information about this.
 
 CONFIGURATION VARIABLES
 -----------------------
@@ -84,7 +66,7 @@ line option:
 The 'help.browser', 'web.browser' and 'browser.<tool>.path' will also
 be checked if the 'web' format is chosen (either by command line
 option or configuration variable). See '-w|--web' in the OPTIONS
-section above.
+section above and linkgit:git-web--browse[1].
 
 Note that these configuration variables should probably be set using
 the '--global' flag, for example like this:

Documentation/git-instaweb.txt

@@ -40,21 +40,9 @@ OPTIONS
 -b|--browser::
 	The web browser that should be used to view the gitweb
 	page. This will be passed to the 'git-web--browse' helper
-	script along with the URL of the gitweb instance. If the
-	script fails, the URL will be printed to stdout.
-+
-Note that the 'git-web--browse' script tries, as much as possible, to
-display the HTML page in a new tab on an already opened browser.
-+
-The following browsers are currently supported by 'git-web--browse':
-+
-* firefox (this is the default under X Window when not using KDE)
-* iceweasel
-* konqueror (this is the default under KDE)
-* w3m (this is the default outside X Window)
-* links
-* lynx
-* dillo
+	script along with the URL of the gitweb instance. See
+	linkgit:git-web--browse[1] for more information about this. If
+	the script fails, the URL will be printed to stdout.
 
 --start::
 	Start the httpd instance and exit.  This does not generate
@@ -85,13 +73,8 @@ You may specify configuration in your .git/config
 -----------------------------------------------------------------------
 
 If the configuration variable 'instaweb.browser' is not set,
-'web.browser' will be used instead if it is defined.
-
-You can explicitly provide a full path to your preferred browser by
-setting the configuration variable 'browser.<tool>.path'. For example,
-you can configure the absolute path to firefox by setting
-'browser.firefox.path'. Otherwise, 'git-web--browse' assumes the tool
-is available in PATH.
+'web.browser' will be used instead if it is defined. See
+linkgit:git-web--browse[1] for more information about this.
 
 Author
 ------

Documentation/git-web--browse.txt

+git-web--browse(1)
+==================
+
+NAME
+----
+git-web--browse - git helper script to launch a web browser
+
+SYNOPSIS
+--------
+'git-web--browse' [OPTIONS] URL/FILE ...
+
+DESCRIPTION
+-----------
+
+This script tries, as much as possible, to display the URLs and FILEs
+that are passed as arguments, as HTML pages in new tabs on an already
+opened web browser.
+
+The following browsers (or commands) are currently supported:
+
+* firefox (this is the default under X Window when not using KDE)
+* iceweasel
+* konqueror (this is the default under KDE)
+* w3m (this is the default outside graphical environments)
+* links
+* lynx
+* dillo
+* open (this is the default under Mac OS X GUI)
+
+OPTIONS
+-------
+-b BROWSER|--browser=BROWSER::
+	Use the specified BROWSER. It must be in the list of supported
+	browsers.
+
+-t BROWSER|--tool=BROWSER::
+	Same as above.
+
+-c CONF.VAR|--config=CONF.VAR::
+	CONF.VAR is looked up in the git config files. If it's set,
+	then its value specify the browser that should be used.
+
+CONFIGURATION VARIABLES
+-----------------------
+
+The web browser can be specified using a configuration variable passed
+with the -c (or --config) command line option, or the 'web.browser'
+configuration variable if the former is not used.
+
+You can explicitly provide a full path to your preferred browser by
+setting the configuration variable 'browser.<tool>.path'. For example,
+you can configure the absolute path to firefox by setting
+'browser.firefox.path'. Otherwise, 'git-web--browse' assumes the tool
+is available in PATH.
+
+Note that these configuration variables should probably be set using
+the '--global' flag, for example like this:
+
+------------------------------------------------
+$ git config --global web.browser firefox
+------------------------------------------------
+
+as they are probably more user specific than repository specific.
+See linkgit:git-config[1] for more information about this.
+
+Author
+------
+Written by Christian Couder <chriscool@tuxfamily.org> and the git-list
+<git@vger.kernel.org>, based on git-mergetool by Theodore Y. Ts'o.
+
+Documentation
+-------------
+Documentation by Christian Couder <chriscool@tuxfamily.org> and the
+git-list <git@vger.kernel.org>.
+
+GIT
+---
+Part of the linkgit:git[7] suite