Created revokecert (markdown)

revokecert.md

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+# How to revoke a cert.
+
+
+```
+acme.sh  --revoke  -d example.com
+```
+
+You can also specify a reason for revocation:
+
+```
+acme.sh --revoke  -d example.com   --revoke-reason 0
+```
+
+The valid reasons are `0-10`,
+See:
+https://tools.ietf.org/html/rfc5280#section-5.3.1
+
+```
+ unspecified             (0),
+        keyCompromise           (1),
+        cACompromise            (2),
+        affiliationChanged      (3),
+        superseded              (4),
+        cessationOfOperation    (5),
+        certificateHold         (6),
+             -- value 7 is not used
+        removeFromCRL           (8),
+        privilegeWithdrawn      (9),
+        aACompromise           (10
+```