Clarify that Darwin and BSD are supported w/ mlock
Clarify that Darwin and BSD are supported w/ mlock

Word smith a tad.

jgcallero/vault,mgk/vault,andrewstuart/vault,rnaveiras/vault,geckoboard/vault,hashbrowncipher/vault,Aloomaio/vault,hashbrowncipher/vault,Caiyeon/vault,lemondrank/vault,hashicorp/vault,annanay25/vault,annanay25/vault,danielsomerfield/vault,michaelansel/vault,Aloomaio/vault,rnaveiras/vault,jam-pot/vault,mgk/vault,jmhardison/vault,doubledutch/vault,jmhardison/vault,quixoten/vault,LolalyLuo/vault,doubledutch/vault,Banno/vault,wjam/vault,geckoboard/vault,doodles526/vault,kingland/vault,quixoten/vault,jam-pot/vault,memory/vault,andrewstuart/vault,careyblack/vault,kingland/vault,mhurne/vault,jmhardison/vault,hashicorp/vault,cimarron-pistoncloud/vault,rnaveiras/vault,kingland/vault,careyblack/vault,peteryhwong/vault,cimarron-pistoncloud/vault,hashicorp/vault,hashicorp/vault,kenbreeman/vault,rnaveiras/vault,careyblack/vault,geckoboard/vault,joelthompson/vault,Aloomaio/vault,doodles526/vault,naunga/vault,careyblack/vault,danielsomerfield/vault,martin-ducar-gd/vault,ryon/vault,careyblack/vault,skippy/vault,hartsock/vault,andrewstuart/vault,chrishoffman/vault,naunga/vault,ryon/vault,kenbreeman/vault,jgcallero/vault,doubledutch/vault,lirao/vault,geckoboard/vault,hashicorp/vault,MonsantoCo/vault,hashbrowncipher/vault,hartsock/vault,chrishoffman/vault,kenbreeman/vault,andrewstuart/vault,mgk/vault,annanay25/vault,deverton/hashicorp-vault,annanay25/vault,mymercurialsky/vault,hashbrowncipher/vault,doubledutch/vault,kingland/vault,wjam/vault,andrewstuart/vault,hashbrowncipher/vault,jmhardison/vault,kenbreeman/vault,mhurne/vault,kingland/vault,rnaveiras/vault,lirao/vault,quixoten/vault,lemondrank/vault,MonsantoCo/vault,geckoboard/vault,hashicorp/vault,jmhardison/vault,michaelansel/vault,hartsock/vault,doubledutch/vault,tallpauley/vault,LolalyLuo/vault,joelthompson/vault,hartsock/vault,quixoten/vault,skippy/vault,joelthompson/vault,joelthompson/vault,mymercurialsky/vault,annanay25/vault,Caiyeon/vault,Aloomaio/vault,Banno/vault,memory/vault,tallpauley/vault,mgk/vault,martin-ducar-gd/vault,deverton/hashicorp-vault,peteryhwong/vault,hartsock/vault,kenbreeman/vault