Clarify that this stretch behavior is for bcrypt
Clarify that this stretch behavior is for bcrypt

* other encryptors show a different behavior regarding the
  number of stretches

onursarikaya/devise,eltonchrls/devise,jnappy/devise,yui-knk/devise,tjgrathwell/devise,9040044/devise,tjgrathwell/devise,MAubreyK/devise,posgarou/devise,hazah/devise,satyaki123/devise,sulestone/devise,posgarou/devise,dgynn/devise,fjg/devise,chrisnordqvist/devise,RailsDev42/devise,solutelabs-savan/deviseOne,timoschilling/devise,andyhite/devise,deivid-rodriguez/devise,yui-knk/devise,randoum/devise,bobegir/devise,RailsDev42/devise,Legalyze/devise,MAubreyK/devise,marlonandrade/devise,djfpaagman/devise,buzybee83/devise,ram-krishan/devise,thejourneydude/devise,janocat/devise,jahammo2/devise,plataformatec/devise,sespindola/devise,marlonandrade/devise,hauledev/devise,LauraWN/devise,sespindola/devise,MAubreyK/devise,djfpaagman/devise,tiarly/devise,sharma1nitish/devise,LauraWN/devise,timoschilling/devise,ar-shestopal/devise,rubyrider/devise,vincentwoo/devise,rlhh/devise,havok2905/devise,randoum/devise,LimeBlast/devise,silvaelton/devise,hauledev/devise,HopeCommUnityCenter/devise,Diego5529/devise,onursarikaya/devise,dgynn/devise,ngpestelos/devise,leonardoprg/devise,chadzilla2080/devise,didacte/devise,kewaunited/devise,satyaki123/devise,thejourneydude/devise,didacte/devise,keeliker/devise,HopeCommUnityCenter/devise,Umar-malik007/devise,DanFerreira/devise,denysnando/devise,cefigueiredo/devise,solutelabs-savan/deviseOne,xymbol/devise,eaconde/devise,jahammo2/devise,leonardoprg/devise,chadzilla2080/devise,plataformatec/devise,JaisonBrooks/devise,rubyrider/devise,RailsDev42/devise,andyhite/devise,yang70/devise,chrisnordqvist/devise,davidrv/devise,4nshu19/devise,yizjiang/devise,nambrot/devise,yui-knk/devise,djfpaagman/devise,thejourneydude/devise,tjgrathwell/devise,imaboldcompany/devise,SiddhiPrabha/devise,ar-shestopal/devise,joycedelatorre/devise,buzybee83/devise,riskgod/devise,NeilvB/devise,hazah/devise,9040044/devise,riskgod/devise,LimeBlast/devise,testerzz/devise,SadTreeFriends/devise,silvaelton/devise,Angeldude/devise,davidrv/devise,deivid-rodriguez/devise,Bazay/devise,ram-krishan/devise,fjg/devise,DanFerreira/devise,dgynn/devise,NeilvB/devise,yizjiang/devise,Odyl/devise,didacte/devise,sulestone/devise,eaconde/devise,betesh/devise,hauledev/devise,LimeBlast/devise,thiagorp/devise,Odyl/devise,cassioscabral/devise,bonekost/devise,kewaunited/devise,JaisonBrooks/devise,posgarou/devise,chrisnordqvist/devise,Diego5529/devise,chadzilla2080/devise,jahammo2/devise,Angeldude/devise,marlonandrade/devise,gauravtiwari/devise,sespindola/devise,testerzz/devise,bolshakov/devise,sferik/devise,randoum/devise,ar-shestopal/devise,Qwiklabs/devise,andyhite/devise,havok2905/devise,shtzr840329/devise,sideci-sample/sideci-sample-devise,Legalyze/devise,Odyl/devise,kewaunited/devise,Ataraxic/devise,denysnando/devise,bonekost/devise,denysnando/devise,gauravtiwari/devise,Legalyze/devise,joycedelatorre/devise,evopark/devise,sharma1nitish/devise,betesh/devise,SiddhiPrabha/devise,Serg09/devise,janocat/devise,yakovenkodenis/devise,havok2905/devise,bobegir/devise,JanChw/devise,sideci-sample/sideci-sample-devise,thiagorp/devise,stanhu/devise,twalpole/devise,davidrv/devise,nambrot/devise,gauravtiwari/devise,4nshu19/devise,keeliker/devise,cassioscabral/devise,bonekost/devise,sharma1nitish/devise,nambrot/devise,evopark/devise,cefigueiredo/devise,yang70/devise,Angeldude/devise,JanChw/devise,Umar-malik007/devise,Diego5529/devise,twalpole/devise,stanhu/devise,Fuseit/devise,joycedelatorre/devise,buzybee83/devise,SadTreeFriends/devise,xymbol/devise,Qwiklabs/devise,satyaki123/devise,evopark/devise,ram-krishan/devise,imaboldcompany/devise,cefigueiredo/devise,Course-Master/devise,onursarikaya/devise,rlhh/devise,zarinn3pal/devise,sulestone/devise,shtzr840329/devise,Fuseit/devise,zarinn3pal/devise,eltonchrls/devise,testerzz/devise,Serg09/devise,Ataraxic/devise,tiarly/devise,thiagorp/devise,HopeCommUnityCenter/devise,xymbol/devise,DanFerreira/devise,vincentwoo/devise,NeilvB/devise,keeliker/devise,JanChw/devise,hazah/devise,yakovenkodenis/devise,yizjiang/devise,4nshu19/devise,jnappy/devise,yang70/devise,Serg09/devise,vincentwoo/devise,twalpole/devise,9040044/devise,bolshakov/devise,yakovenkodenis/devise,SadTreeFriends/devise,Bazay/devise,riskgod/devise,sferik/devise,shtzr840329/devise,rlhh/devise,LauraWN/devise,solutelabs-savan/deviseOne,bobegir/devise,ngpestelos/devise,Umar-malik007/devise,betesh/devise,silvaelton/devise,tiarly/devise,SiddhiPrabha/devise,eaconde/devise,Bazay/devise,zarinn3pal/devise,Ataraxic/devise,janocat/devise,rubyrider/devise,eltonchrls/devise,JaisonBrooks/devise,Course-Master/devise