implement usage of ExistingObjectTag in GetObjectAction

Increase lookupEnv timeout to 6.5 seconds (minio#25)

Signed-off-by: Daniel Valdivia <18384552+dvaldivia@users.noreply.github.com>

auto trim environment values for unexpected characters (minio#23)

add missing iam-policy statement SID

policy statements should preserve SID when cloning policies

update deps and remove go1.16 support

update madmin-go v1.1.19

build workflows on go1.17

Add certificate reload functions (minio#17)

Allows reload on os signal or manual reloads.

Some simplifications to existing code added.

First part of minio/minio#13662

* 1h -> 15m

add IsAllowedActions() to return all allowed actions

IsAllowedActions() returns a set of allowed actions
as per input arguments such as bucket, object name
resources and other variable policy conditions.