Log Message:
Update www/thttpd to 2.26.

Changes from previous:
----------------------
- Ignore ECONNABORTED on accept().
- Correctly implemented the config-file option change from "nosymlink" to
  "nosymlinkcheck", which was supposedly done in version 2.24.
- Removed mailto: link from default index page.
- Allow CGIs to provide both Location and Status headers. (A. Skrobov)
- Better logic for figuring out CGI SERVER_NAME environment variable. (Oleg)
- Updated for clang, and general cleanup.