mq: fix qnew and qimport to deal with series file comments qnew and qimport did not take comments into account when deciding where to place new patches in the series file.

#!/bin/sh

hg init
echo This is file a1 > a
hg add a
hg commit -m "commit #0" -d "1000000 0"
touch b
hg add b
rm b
hg commit -A -m"comment #1" -d "1000000 0"