What version of ha-proxy supports init-addr?

[Rinaldo DiGiorgio]

Hi,

        I see many comment son the web about how it was added in 1.7 but I 
unable to find init-addr in 1.7, 1.7.1 or 1.72.  I do find a description in 
1.8. Is it available in 1.7.2 but not documented?

Rinaldo