Merge r1603027, r1603029, r1603122 from trunk:

Merge r1603027, r1603029, r1603122 from trunk:

Fix bug introduced in r1591508 which resulted in the final empty
FCGI_STDIN not being sent.  Interaction with latest uWSGI (and
probably other protocol implementations) breaks without this.

Reindent after small fix in r1603027

mod_proxy_fcgi: follow up to r1592032.

Also break the outer loop when "sending stdin" fails.

Submitted by: trawick, ylavic
Reviewed/backported by: jim

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1603140 13f79535-47bb-0310-9956-ffa450edef68