1) On win32: use O_EXCL to get atomic file lock.       the link() call used by the Unix code does not work on Windows. 2) For certain pid, the lock file created by unique_lock() pop a bogus Norton Anti-virus alert.      added a leading "#" character in the lock file to make Norton Anti-virus filter happy.
1) On win32: use O_EXCL to get atomic file lock. 
     the link() call used by the Unix code does not work on Windows.
2) For certain pid, the lock file created by unique_lock() pop a bogus Norton Anti-virus alert.
     added a leading "#" character in the lock file to make Norton Anti-virus filter happy.

bk: 3ce432e1xQ0lYBe4SzdabT1tOnn2yw
bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper