This update for viewvc fixes the following issues:
- update to 1.1.28 (boo#1167974, CVE-2020-5283):
- security fix: escape subdir lastmod file name (#211)
- fix standalone.py first request failure (#195)
- suppress stack traces (with option to show) (#140)
- distinguish text/binary/image files by icons (#166, #175)
- colorize alternating file content lines (#167)
- link to the instance root from the ViewVC logo (#168)
- display directory and root counts, too (#169)
- fix double fault error in standalone.py (#157)
- support timezone offsets with minutes piece (#176)