Log Message:
(cad/klayout) Updated 0.26.8 to 0.26.10 ( 0.26.11, 0.27.0 are waiting)

Based on wip/klayout (a little bit old version) by Atzushi Toyokura work.
(pkgsrc)
 - rename patch
 - Add comment on patches
 - more PLIST_SUBST

(upstream changes)
0.26.10         (2020-02-02):

* Enhancement: %GITHUB%/issues/720
  "Safe save" and backups: when saving files, the file is only \ 
overwritten after
  the save terminated successfully. This will avoid loss of data for full volumes
  or network share dropouts. In addition, a configurable number of back files can
  be kept (see File/Setup: Application/General).
* Bugfix: %GITHUB%/issues/718
  GDS export issue fixed (breaking of polygons was filling holes)
* Bugfix: %GITHUB%/issues/709
  LVS compare enters infinite loop when it encounters two entirely identical \ 
subcircuits
* Bugfix: %GITHUB%/issues/708
  Qt binding: missing support for binary strings as QByteArray representative
* Bugfix: %GITHUB%/issues/707
  QJsonValue's string constructor is ambiguous
* Bugfix: %GITHUB%/issues/704
  Rational Splines not supported DXF
* Bugfix: %GITHUB%/issues/693
  MAGIC files won't find subcells when reading from command line
* Bugfix: HTTP stream reading issue with redirect
  At least on MacOS a segfault happened when reading HTTP stream data
  (e.g. for package manager) from addresses which are redirected.
* Enhancement: Removed %APPDATA% from DLL search path on Windows
  This will avoid installation poisoning by the one from %APPDATA%
  (which ironically is the default installation path). Eventually
  multiple versions can be used in parallel.

0.26.9          (2020-11-27):

* Bugfix: %GITHUB%/issues/658
      Menu items were not put into the right place on MacOS.
* Bugfix: %GITHUB%/issues/652
      "M" factor scaling was not working for Spice reader.
* Bugfix: %GITHUB%/issues/651
      Fixed an issue with DRC "select".
* Bugfix: %GITHUB%/issues/647
      Text orientation was not considered properly in search & replace
* Bugfix: %GITHUB%/issues/646
      A potential crash was fixed happening when a PCell
      library is deleted
* Bugfix: Display bug
      Cell placements with small magnification factors (such that the
      viewport dimensions exceeded the DBU space when seem from inside
      the cell) lead to display errors.