To force a restart at the end of test, the option file must be non-empty, it's not enough if it exists and is empty.

in short we now record whenever the slave I/O thread ignores a master's event because of its server id,
and use this info in the slave SQL thread to advance Exec_master_log_pos. Because if we
do not, this variable stays at the position of the last executed event, i.e. the last *non-ignored*
executed one, which may not be the last of the master's binlog (and so the slave *looks* behind
the master though it's data-wise it's not).

msql.txt	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/msql.txt
prof.txt	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/prof.txt
algor.txt	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/algor.txt
realmen.txt	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/realmen.txt
dbi.txt 	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/dbi.txt
ecomm.txt	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/ecomm.txt
dubois.txt	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/dubois.txt
sql-99.txt	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/sql-99.txt
pthreads.txt	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/pthreads.txt
manual.txt	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/manual.txt
in_21.txt	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/in_21.txt
argentina.txt	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Flags/argentina.txt
argentina.gif	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Flags/argentina.gif
prof.gif	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/prof.gif
realmen.gif	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/realmen.gif
msql.gif	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/msql.gif
manual.gif	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/manual.gif
pthreads.gif	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/pthreads.gif
ecomm.gif	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/ecomm.gif
dbi.gif 	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/dbi.gif
in_21.gif	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/in_21.gif
dubois.gif	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/dubois.gif
algor.gif	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/algor.gif
sql-99.gif	BitKeeper file /opt/local/x1/work/bk/mysql/Docs/Books/sql-99.gif