* apt-pkg/packagemanager.cc:

* apt-pkg/packagemanager.cc:
  - add output about pre-depends configuring when debug::pkgPackageManager
    is used
* methods/https.cc:
  - fix incorrect use of CURLOPT_TIMEOUT, closes: #497983, LP: #354972
    thanks to Brian Thomason for the patch
* apt-pkg/depcache.cc, apt-pkg/indexcopy.cc:
  - typo fix (LP: #462328)

* cmdline/apt-key:
  - Emit a warning if removed keys keyring is missing and skip associated
    checks (LP: #218971)