Log Message:
Update www/viewcvs to v1.2.3

Upstream's changelog:

Version 1.2.3 (released 04-Jan-2023)

  * security fix: escape revision view copy paths (#311) [CVE-2023-22464]

Version 1.2.2 (released 03-Jan-2023)

  * security fix: escape revision view changed paths (#311) [CVE-2023-22456]
  * standalone.py defaults to UTF-8 output now, too
  * fix viewvc-install error handling bug
  * fix a problem on CVS checkout files with rcsparse (#272)