config: make parsing of duration options consistent

All user visible Durations should be fs.Duration rather than time.Duration. Suffix is then optional and defaults to s. Additional suffices d, w, M and y are supported, in addition to ms, s, m and h - which are the only ones supported by time.Duration. Absolute times can also be specified, and will be interpreted as duration relative to now.

cmd/bisync/operations.go

@@ -138,7 +138,7 @@ func Bisync(ctx context.Context, fs1, fs2 fs.Fs, optArg *Options) (err error) {
 					if b.SyncCI != nil {
 						fs.Infoc(nil, Color(terminal.YellowFg, "Telling Sync to wrap up early."))
 						b.SyncCI.MaxTransfer = 1
-						b.SyncCI.MaxDuration = 1 * time.Second
+						b.SyncCI.MaxDuration = fs.Duration(1 * time.Second)
 						b.SyncCI.CutoffMode = fs.CutoffModeSoft
 						gracePeriod := 30 * time.Second // TODO: flag to customize this?
 						if !waitFor("Canceling Sync if not done in", gracePeriod, func() bool { return b.CleanupCompleted }) {