Merge with crew-stable

test: added testcase for cvsps log message lookahead

cvsps: cvs log loop uses lookahead to avoid misleading text Changes cvsps.py's cvs log reader to use a one-line lookahead, so that possibly misleading log messages can be disambiguated. In particular I have past committers who used cvs log's 28-character row of hyphens within commit messages; this throws cvsps and disrupts conversion. The only alternative in this case is to edit the cvs ,v file by hand, which bloodies mercurial's "don't change history" principle.

convert/gnuarch: recode cat-log parts to utf-8 to be hg.description friendly

convert/gnuarch: add cat-log payload to commit description

bisect: improve hg bisect -c (relative paths, error handling) hg bisect -c failed with a relative path or when the executable wasn't found. Use util.find_exe()+os.spawnl() instead of os.spawnlp() and improve the handling of errors (killed process, exe not found). Thanks to Georg Brandl for reporting it.

merge with crew-stable

convert/gnuarch: correct indentation

merge with crew

test-audit-path: add one more test (issue 1450)

convert/gnuarch: follow continuation-of revisions Built on top of previous patches: - continuation-of parsing - registered archives retrieval - use of fully qualified revisions This allows the converter scanning for more source revisions following the tree versions 'leaked' through the continuation-of informations. Coupled with the registered archives retrieval, this makes possible to decide to follow such a hint or stop scanning for more revisions. This also implies some changes in the retrieval of some base-0 revisions when they're continuation-of other revisions, in that case a 'replay' will work where a simple 'get' fails because the dir exists already. I found the code dealing with 'replay' quite good as it has already a fallback to 'get' in the error path.

convert/gnuarch: retrieve known archive names list This will make possible in a followup patch to prevent following history that is not reachable because an archive is unknown to the user.