Apply the Debian patchset

Debian source package: tcl-tclreadline 2.1.0-12

Fully applied patches:
* complete_nontcl.patch
* completion_matches.patch
* completion_pbug.patch
* memuse.patch
* tclshpath.patch
* varnames.patch

Partially applied patches:
* manpage.patch
* tinfo.patch

Dropped patches:
* kfreebsd.patch
* link.patch
* tclrldir.patch