amass, httprobe, sublist3r, theHarvester: add page (#4912)

pages/common/sublist3r.md

@@ -0,0 +1,20 @@
+# sublist3r
+
+> Fast subdomains enumeration tool for penetration testers.
+> More information: <https://github.com/aboul3la/Sublist3r>.
+
+- Find subdomains for a domain:
+
+`sublist3r --domain {{domain_name}}`
+
+- Find subdomains for a domain, also enabling brute force search:
+
+`sublist3r --domain {{domain_name}} --bruteforce`
+
+- Save the found subdomains to a text file:
+
+`sublist3r --domain {{domain_name}} --output {{path/to/output_file}}`
+
+- Output all available options:
+
+`sublist3r --help`