Merge branch 'js/ref-namespaces'

* js/ref-namespaces:
ref namespaces: tests
ref namespaces: documentation
ref namespaces: Support remote repositories via upload-pack and receive-pack
ref namespaces: infrastructure
Fix prefix handling in ref iteration functions

diff --cc Documentation/Makefile
Simple merge

diff --cc Documentation/git-receive-pack.txt
Simple merge

diff --cc Documentation/git-upload-pack.txt
Simple merge

diff --cc Documentation/git.txt
Simple merge

diff --cc builtin/receive-pack.c
Simple merge

diff --cc cache.h
Simple merge

diff --cc contrib/completion/git-completion.bash
Simple merge

diff --cc environment.c
Simple merge

diff --cc git.c
Simple merge

diff --cc refs.c
Simple merge

diff --cc refs.h
Simple merge