WL#3173: Put parse points in mysqldump

Request from Brian Aker/Robin Schumacher for a WL task:
Put parse points in mysqldump

Further details from an IRC conversation between Brian and 
Serg Golubchik, 2006-03-03:
[10:41]  brian: what is a "parse point" ?
[10:44]  serg: For each create table (ok, begin of some atomic unit)
record the position and length. At the end of the file put in an index of these
point.
[10:45]  serg: A multi-threaded application can open this up, and use the
index to find out where each thread should parse from.
[10:45]  for multi-threaded mysqlimport ?
[10:45]  I see