Replacing NULL characters with spaces.
Some files log files contains NULL characters and track2sql would
happily convert them into SQL statements. This may cause problem
when we insert the generated statements into the database. For
example:
$ xzcat log.gz| php track2sql.php - -| mysql mydb
ERROR 1064 (42000) at line 73164: You have an error in your SQL
syntax; check the manual that corresponds to your MySQL server version
for the right syntax to use near
'07d4e0a7-1b46-d94f-662d-a69a1ee2266f','trigger',54,0,53,1,0,0,1,1448,0,0,0,1,0,0'
at line 1.
... which is not very helpful as it's not referring to the SQL
statement which contains the NULL chars.