Merge r1533765, r1621419, r1638159, r1638188, r1601603, r1638412, r1418763 from trunk

    ssl: Axe needless string duplication in setup for call to apr_proc_create()
    Fix sscanf format spotted by cppcheck
    fix indent.
    fix style
    Private function doesn't need ap_ prefix.
    tab vs space
    rename variables: s should be the server_rec

Submitted by: trawick, jailletc36, jailletc36, jailletc36, takashi, jailletc36, sf
Reviewed by: jailletc36, ylavic, covener
Backported by: jailletc36

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1642403 13f79535-47bb-0310-9956-ffa450edef68