* print: charge skipped whitespace and comments to the lexer's token budget
Lexer::skip_ws scanned whitespace and comments without charging them,
so an annotation object behind a long comment was rescanned in full for
every reference to it, outside the per-object and job-wide budgets. The
skipped bytes now count like tokens, and the scan stops at the budget.
* address review: fail objstm load when header lexer exhausts, restore token charge on failed reference lookahead
* address review: charge objstm header lexer tokens to the job budget
Dylan M. Taylor
cb82b90580