anchor.diff:  |Allow external authentication
   |&#10004;
   |&#10004; +
  -via Spring security or via pluggable realms written in Groovy
  +via Spring security or via pluggable realms written in Groovy; +
  +OAuth +
  + - Google +
  + - Open ID +
  + - GitHub Enterprise
   |&#10004; +
   via Shiro
   |
  
positive.code: (Pro)
  |&#10004; +
  (OSS) browsing, searching and custom metadata aren't supported
  |
  |&#10004; +
  read only
  
  
negative.code: 
  |*Latest Version*
  |2.0.1
  |4.2.2
  |2.11.2
  |3.0
  |0.12.1
  