Pluggable CAPTCHA

panel:bgColor=e7f4fa NOTE: This suggestion is for JIRA Cloud. Using JIRA Server? See the corresponding suggestion|http://jira.atlassian.com/browse/JRASERVER-21359. panel CAPTCHA should be pluggable in JIRA CAPTCHA|http://en.wikipedia.org/wiki/CAPTCHA is supposed to stop spam and other automated...