* cmdline/apt-get.cc:

* cmdline/apt-get.cc:
  - fix in the task-install code regexp (thanks to Adam Conrad and
    Colin Watson). This should bring the livecd build back into
    shape

* Fix compilation warnings:
  - apt-pkg/contrib/configuration.cc: wrong argument type;
  - apt-pkg/deb/dpkgpm.cc: wrong signess;
  - apt-pkg-acquire-item.cc: wrong signess and orderned initializers;
  - methods/https.cc:
    - type conversion;
    - unused variable;
    - changed SetupProxy() method to void;