Add docs

Author: jhart-r7

documentation/modules/auxiliary/scanner/misc/cisco_smart_install.md

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+## Vulnerable Application
+
+  Any system exposing the Cisco Smart Install protocoll, SMI, typically on 4786/TCP.
+
+## Verification Steps
+
+  1. Do: ```use auxiliary/scanner/misc/cisco_smart_install```
+  2. Do: ```set [RHOSTS]```, replacing ```[RHOSTS]``` with a list of hosts to test for the presence of SMI
+  3. Do: ```run```
+  4. If the host is exposing an identifiable SMI instance, it will print the endpoint.
+
+
+## Scenarios
+
+  ```
+msf auxiliary(cisco_smart_install) > run
+
+[*] Scanned  57 of 512 hosts (11% complete)
+[*] Scanned 105 of 512 hosts (20% complete)
+[*] Scanned 157 of 512 hosts (30% complete)
+[*] Scanned 212 of 512 hosts (41% complete)
+[*] Scanned 256 of 512 hosts (50% complete)
+[*] Scanned 310 of 512 hosts (60% complete)
+[*] Scanned 368 of 512 hosts (71% complete)
+[*] Scanned 413 of 512 hosts (80% complete)
+[*] Scanned 466 of 512 hosts (91% complete)
+[+] a.b.c.d:4786   - Fingerprinted the Cisco Smart Install protocol
+[*] Scanned 512 of 512 hosts (100% complete)
+[*] Auxiliary module execution completed
+```