extmon: placeholder %%THING%% changed to %%ITEM%%
check for dcmap=>hash in metafo/geoip
no need for long ok_codes in plugin_http_status
metaplugins now support CNAME monitoring
Minor correctness fixups for dname_cmp
use dname-form to de-dupe cname monitors
skip unload txn for djb if not active
bring NEWS for 2.x somewhat up-to-date
Merge branch 'master' into 2.x