Re: [PATCH 0/4] Build in some more things

> The main effect of this series is removing the fork/exec from pushing via 
> the git protocol (aside from the later fork/exec in connect.c of course).
> 
> It also heads off some tempting transport-related fetch bugs, which I will 
> not introduce in a later patch.
> 
> * Miscellaneous const changes and utilities
>   Adds two small utility functions, and marks a bunch of stuff as const; 
>   the const stuff is to keep builtin-fetch from getting messed up without 
>   a warning, because it wants some lists not to change.
> 
> * Build-in peek-remote, using transport infrastructure.
> * Build-in send-pack, with an API for other programs to call.
> * Use built-in send-pack.