Document OAuth2UserService delegation-based strategy for authorities mapping
Document OAuth2UserService delegation-based strategy for authorities mapping

Fixes gh-4909

rwinch/spring-security,eddumelendez/spring-security,eddumelendez/spring-security,fhanik/spring-security,spring-projects/spring-security,kazuki43zoo/spring-security,spring-projects/spring-security,jgrandja/spring-security,rwinch/spring-security,eddumelendez/spring-security,jgrandja/spring-security,spring-projects/spring-security,rwinch/spring-security,rwinch/spring-security,djechelon/spring-security,fhanik/spring-security,djechelon/spring-security,fhanik/spring-security,djechelon/spring-security,kazuki43zoo/spring-security,fhanik/spring-security,jgrandja/spring-security,rwinch/spring-security,eddumelendez/spring-security,jgrandja/spring-security,djechelon/spring-security,rwinch/spring-security,spring-projects/spring-security,spring-projects/spring-security,fhanik/spring-security,kazuki43zoo/spring-security,spring-projects/spring-security,kazuki43zoo/spring-security,jgrandja/spring-security,kazuki43zoo/spring-security,fhanik/spring-security,jgrandja/spring-security,djechelon/spring-security,eddumelendez/spring-security,spring-projects/spring-security