FEATURE: allow shipping bio markdown via SSO

- Also adds site setting for sso_overrides_bio to disable bio editing by end users

config/locales/server.en.yml

@@ -977,6 +977,7 @@ en:
     enable_sso_provider: "Implement Discourse SSO provider protocol at the /session/sso_provider endpoint, requires sso_secret to be set"
     sso_url: "URL of single sign on endpoint (must include http:// or https://)"
     sso_secret: "Secret string used to cryptographically authenticate SSO information, be sure it is 10 characters or longer"
+    sso_overrides_bio: "Overrides user bio in user profile and prevents user from changing it"
     sso_overrides_email: "Overrides local email with external site email from SSO payload on every login, and prevent local changes. (WARNING: discrepancies can occur due to normalization of local emails)"
     sso_overrides_username: "Overrides local username with external site username from SSO payload on every login, and prevent local changes. (WARNING: discrepancies can occur due to differences in username length/requirements)"
     sso_overrides_name: "Overrides local full name with external site full name from SSO payload on every login, and prevent local changes."

config/site_settings.yml

@@ -288,6 +288,7 @@ login:
     default: ''
     regex: '^https?:\/\/.+[^\/]$'
   sso_secret: ''
+  sso_overrides_bio: false
   sso_overrides_email: false
   sso_overrides_username: false
   sso_overrides_name: false