use a more reliable way to find what are the new changesets on pull/unbundle
The number of csets and the hooks where wrong (negative number of csets) when
we unbundled a bundle which contains csets we already had.
Remove unused variables.
#!/bin/shhg initmkfifo phg serve --stdio < p &P=$!(echo lock; echo addchangegroup; sleep 5) > p &Q=$!sleep 1kill -HUP $Pwaitls .hg