Merge r1584878 from trunk:

Do not delete the wrong data from HTML code when a "http-equiv" meta tag specifies a Content-Type behind any other "http-equiv" meta tag.
PR 56287 [Micha Lenk <micha lenk info>]
Submitted by: jailletc36
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1587693 13f79535-47bb-0310-9956-ffa450edef68