mysqldump --show_progress_size option missing?

[Steven Hyland]

According to this link (http://lists.mysql.com/commits/104496), a patch was committed to mysqldump.exe over a year ago that would print progress to the command line every so many lines if mysqldump was invoked with the options --verbose and --show_progress_size. However, when I run the command

mysqldump -u <user> -p<password> --verbose --show_progress_size <database_name> > "C:\thingy.sql"

I get the error message below:

mysqldump: unknown option '--show_progress_size'

I am unable to find any record of this option being removed from mysqldump. I am using version 5.1.58 of MySQL community server, with mysqldump at Ver 10.13.