zipcloak: add page (#8914)

pages/linux/zipcloak.md

@@ -0,0 +1,16 @@
+# zipcloak
+
+> Encrypt the contents within a zipfile.
+> More information: <https://manned.org/zipcloak>.
+
+- Encrypt the contents of a zipfile:
+
+`zipcloak {{path/to/archive.zip}}`
+
+- [d]ecrypt the contents of a zipfile:
+
+`zipcloak -d {{path/to/archive.zip}}`
+
+- [O]utput the encrypted contents into a new zipfile:
+
+`zipcloak {{path/to/archive.zip}} -O {{path/to/encrypted.zip}}`