PGASetMutationBoundedFlag(3) on Linux
The text 131d9ca80c5b, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it. The page shows this text now.
If this flag is set to PGA_TRUE, then for Integer and Real strings whenever a gene is mutated, if it underflows (overflows) the lower (upper)bound it is reset to the lower (upper) bound.