svn import: incremental imports
svn import: incremental imports

Incremental imports skipped a revision.

Also improve interrupt safety -- ^C while writing a tag caused the tag
to be skipped.

Signed-Off-By: Matthias Urlichs <2e8175c327a6ef2d99764f30d3e9e7982997195e@smurf.noris.de>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git