Release 0.17
Merge from master
Release 0.20
Merge commit 'branch-0.21' into release
Release 0.21
Merge commit 'branch-0.22' into release
Release 0.22
Merge commit 'branch-0.23' into release
Release 0.23
typo fix
Build system trivia
Merge branch 'release'
Update copyright dates
Release 0.24
spoolstats: a couple more user agent table entries