- Add patch tcsh-6.20-rmstar.patch from mailing list to restore
the correct behaviour of `rm *' if rmstar is set

- Update to tcsh bug fix version V6.20.00 - 20161124
* Don't resize the screen if it did not change size.
* restore file description when cleaning up after eval:
repeat 99 time
* PR/572: Fix $SHLVL issue when exec'ing subshells.
* PR/403: Fix backquote expansion for multi-byte character sets.
* Fix drawing issu with multi-line prompt (Kensuke Iwahashi/David Kaspar)
* always send prusage to stdout.
* PR/526: Fix double \\ printing from previous fix in history expansion.
* Android updates from Corinna Vinschen
* PR/526: Quote backslashes properly so they can be preserved in ``
expansions
* Fix memory leak for paraml
* Add notempty and ask values for the noclobber setting (Martin Tournoij)
* more correct $wordchars for vimode (Luke Mewburn)
* expose VImode in $vimode (Luke Mewburn)
* display what the compiled in editor is in bindkey -d (Luke Mewburn)
* run-fg-editor improvements and documentation (Luke Mewburn)
* Fix parsing of 'if (cond)then' (Fridolin Pokorny)
* PR/437: Fix handling of invalid unicode characters.
* PR/451: Fix error messages containing %c to be always '%c'
- Rename patch tcsh-6.18.03.dif which becomes tcsh-6.20.00.dif now
- Drop patch union-wait.patch as now upstream
- Modify patches
tcsh-6.15.00-pipe.dif
tcsh-6.17.06-dspmbyte.dif
tcsh-6.18.03-colorls.dif