largefiles: add error checking to tags conversion (issue3092) Check for errors when parsing .hgtags during lfconvert, and skip lines that don't parse or refer to invalid changesets.

largefiles: don't reference uninitialized variable (issue3092)

merge with i18n

i18n-ru: synchronized with e251250ac20b

i18n-ru: revsets predicates translated

i18-ru: debug commands translated

i18n-ru: user prompt related strings translated

i18n-ru: tanslated record-zeroconf

merge with stable

rebase: reinstate old-style rev spec support for the source and base (issue3181) As of b12362ab13e7 (first released as part of Mercurial 2.0), the rebase command accepted ONLY revsets for the source and base arguments and no longer accepted old-style revision specifications. As a result, some revision names were no longer recognised, e.g. hg rebase --base br-anch abort: unknown revision 'br'! These arguments are now interpreted first as old-style revision specifications, then as revsets when no matching revision is found. This restores backwards compatibility with releases prior to 2.0.