doc: release notes for 8.17
doc: release notes for 8.17

romani/checkstyle,romani/checkstyle,rnveach/checkstyle,rnveach/checkstyle,romani/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,rnveach/checkstyle,romani/checkstyle,checkstyle/checkstyle,checkstyle/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,romani/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,romani/checkstyle,checkstyle/checkstyle