Add git-reup and friends

docs/man1/git-reparent-branch.1

 '\" t
-.\"     Title: git-nav-downstream
+.\"     Title: git-reparent-branch
 .\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
 .\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
-.\"      Date: 03/14/2014
+.\"      Date: 03/23/2014
 .\"    Manual: Chromium depot_tools Manual
-.\"    Source: depot_tools a57ed8f
+.\"    Source: depot_tools 936565b
 .\"  Language: English
 .\"
-.TH "GIT\-NAV\-DOWNSTREAM" "1" "03/14/2014" "depot_tools a57ed8f" "Chromium depot_tools Manual"
+.TH "GIT\-REPARENT\-BRANC" "1" "03/23/2014" "depot_tools 936565b" "Chromium depot_tools Manual"
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 .\" * MAIN CONTENT STARTS HERE *
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 .SH "NAME"
-git-nav-downstream \- Checkout a downstream branch of the currently checked out branch\&.
+git-reparent-branch \- Alter the parentage (upstream) for the current branch\&.
 .SH "SYNOPSIS"
 .sp
 .nf
-\fIgit nav\-downstream\fR
+\fIgit reparent\-branch\fR <new_parent>
 .fi
 .sp
 .SH "DESCRIPTION"
 .sp
-\fIgit\-nav\-downstream\fR takes the current branch and discovers all branches downstream of it\&. If there is only one branch downstream of the current branch, the command will check that out\&. If there\*(Aqs more than one downstream branch, the command will prompt you with a selection of the branches\&.
-.SH "EXAMPLE"
+Change the \fIupstream\fR of the current branch, and then run \fBgit-rebase-update\fR(1) to move the commits in the current branch, as well as the commits in all descendant branches, onto the new parent\&.
+.sp
+<new_parent> may be either a local branch, remote branch, OR a tag (such as lkgr)\&.
+.sp
+This is particularly useful to reparent an independent CL to become dependent on another CL, or vice versa\&. This could happen if you started both on the assumption that they were independent, but later realized that this was not the case\&.
+.SH "SUGGESTED ALIASES"
+.sp
+Some common short\-hand aliases\&. Feel free to add these to your \fI~/\&.gitconfig\fR file\&.
 .sp
 .if n \{\
 .RS 4
 .\}
 .nf
-\fB$ git map\-branches\fR
-\fBorigin/master *\:\fR
-  cool_feature
-    subfeature
-  frozen_changes
-  master
-{NO UPSTREAM}
-  bogus_noparent
-\fB$ git nav\-downstream\fR
-
-Please select a downstream branch
-  0\&. cool_feature
-  1\&. frozen_changes
-  2\&. master
-Selection (0\-2)[0]: 0
-\fB$ git map\-branches\fR
-origin/master
-  \fBcool_feature *\:\fR
-    subfeature
-  frozen_changes
-  master
-{NO UPSTREAM}
-  bogus_noparent
+[alias]
+  git rp = reparent\-branch
 .fi
 .if n \{\
 .RE
 .\}
 .sp
 .SH "SEE ALSO"
 .sp
-\fBgit-map-branches\fR(1), \fBgit-nav-upstream\fR(1)
+\fBgit-rebase-update\fR(1), \fBgit-rename-branch\fR(1), \fBgit-new-branch\fR(1), \fBgit-upstream-diff\fR(1)
 .SH "CHROMIUM DEPOT_TOOLS"
 .sp
 Part of the chromium \fBdepot_tools\fR(1) suite\&. These tools are meant to assist with the development of chromium and related projects\&. Download the tools from \m[blue]\fBhere\fR\m[]\&\s-2\u[1]\d\s+2\&.
 .SH "NOTES"
 .IP " 1." 4
 here
 .RS 4
 \%https://chromium.googlesource.com/chromium/tools/depot_tools.git
 .RE