[Makefile] fix missing rules preventing dry-runs

remove old config loader

add new config parser

remove tm_isdst = -1 because this was just a test

use _mkgmtime instead of mktime in parse_iso8601() on windows

add tests for util_parse_creationdate

(0) -300 -100 -30 -10 -6 +6 +10 tip

mercurial