add HGRCPATH env var, list of places to look for hgrc files. if set, override default hgrc search path. if empty, only .hg/hgrc of current repo read. for each element, if directory, all entries in directory with end in ".rc" are added to path. else, element is added to path. big thing about this change is that user "~/.hgrc" and system hgrc not longer breaks tests. run-tests makes HGRCPATH empty now.

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# repo.py - repository base classes for mercurial

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#

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# Copyright 2005 Matt Mackall <mpm@selenic.com>

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#

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# This software may be used and distributed according to the terms

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# of the GNU General Public License, incorporated herein by reference.

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class RepoError(Exception): pass