rebase howto

[Ollivier Robert]

According to Neal Becker:
> Ah, so I should extracted a clean tarbar, and copied only .hg dir from 
> boost_1_37_0.dist on top?

That is what I usually do and it works.  I didn't know about "addremove
--similarity" though, interesting.
-- 
Ollivier ROBERT -=- FreeBSD: The Power to Serve! -=- roberto at keltia.freenix.fr
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