Log Message:
cppcms: update to 1.2.1.

Major changes in this version:
    Redesigned applications pool and its API, now it wouldn't create
    more synchronous applications than threads available.
    New non-blocking I/O mode
    On-the-fly input content processing support
    Improved url-dispatching for better support of RESTful services
    Improved plugin support
    Independent of context use of cache and session interfaces
    Support of non-cookies based session handling
    Integration of session handling with 3rd part technologies:
    PHP, Java Servlet, Aps.Net and so on and contributed modules.
    Major performance and memory use improvements.
    New <% filter ... %> block specifying default escape filter.
    Headers and Source separation by templates compiler. Special
    thanks to Lee Elenbaas for the major contribution.