Rename lost+found to lost-found.

Because we use "lost-found" as the directory name to hold
dangling object names, it is confusing to call the command
git-lost+found, although it makes sense and is even cute ;-).
Signed-off-by: NJunio C Hamano <junkio@cox.net>

.gitignore

@@ -42,7 +42,7 @@ git-index-pack
 git-init-db
 git-local-fetch
 git-log
-git-lost+found
+git-lost-found
 git-ls-files
 git-ls-remote
 git-ls-tree

Documentation/git-lost+found.txt → Documentation/git-lost-found.txt

-git-lost+found(1)
+git-lost-found(1)
 =================
 
 NAME
 ----
-git-lost+found - Recover lost refs that luckily have not yet been pruned.
+git-lost-found - Recover lost refs that luckily have not yet been pruned.
 
 SYNOPSIS
 --------
-'git-lost+found'
+'git-lost-found'
 
 DESCRIPTION
 -----------
@@ -31,7 +31,7 @@ The ref to your tag is overwritten, but until you run 'git
 prune', it is still there.
 
 ------------
-$ git lost+found
+$ git lost-found
 [1ef2b196d909eed523d4f3c9bf54b78cdd6843c6] GIT 0.99.9c
 ...
 ------------

Documentation/git.txt

@@ -309,7 +309,7 @@ gitlink:git-convert-objects[1]::
 gitlink:git-cvsimport[1]::
 	Salvage your data out of another SCM people love to hate.
 
-gitlink:git-lost+found[1]::
+gitlink:git-lost-found[1]::
 	Recover lost refs that luckily have not yet been pruned.
 
 gitlink:git-merge-one-file[1]::

Makefile

@@ -90,7 +90,7 @@ SCRIPT_SH = \
 	git-applymbox.sh git-applypatch.sh git-am.sh \
 	git-merge.sh git-merge-stupid.sh git-merge-octopus.sh \
 	git-merge-resolve.sh git-merge-ours.sh git-grep.sh \
-	git-lost+found.sh
+	git-lost-found.sh
 
 SCRIPT_PERL = \
 	git-archimport.perl git-cvsimport.perl git-relink.perl \