feature.pm add __END__, split POD, less IO/CPU parse time

[bulk88]

-feature.pm is 29 KB big, don't IO read or parse 22 KB of POD

feature.pm's POD in the middle is from its initial commit

69bcf1d3d727aba8df8f279ed93ee56eea0cd15f 12/22/2011 1:46:41 AM Create regen/feature.pl

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• This set of changes requires a perldelta entry, and it is included.