Ignore Held packages; This global options causes the problem resolver to
ignore held packages in its decision making.
+dit(bf(Clean-Installed))
+Defaults to on. When turned on the autoclean feature will remove any pacakge
+which can no longer be downloaded from the cache. If turned off then
+packages that are locally installed are also excluded from cleaning - but
+note that APT provides no direct means to reinstall them.
+
dit(bf(Immediate-Configure))
Disable Immedate Configuration; This dangerous option disables some
of APT's ordering code to cause it to make fewer dpkg calls. Doing