[RELEASE] Released version 1.3.15.11

[RELEASE] Released version 1.3.15.11

Released version 1.3.15.11 with the following main changes :
    - [MINOR] Allow to specify a domain for a cookie
    - [BUG/CLEANUP] cookiedomain -> cookie_domain rename + free(p->cookie_domain)
    - [DOC] trivial fix for man page
    - [BUILD] use "git cmd" instead of "git-cmd"
    - [DOC] add a reminder about obsolete documents
    - [BUG] config: fix erroneous check on cookie domain names
    - [BUG] config: cookie domain was ignored in defaults sections
    - [MINOR] config: support passing multiple "domain" statements to cookies