Fixed return value processing and mypy warning in algorithm_lookup(). Updated help listing, man page, and README.

ssh-audit.1

@@ -61,6 +61,11 @@ Specify the minimum output level.  Default is info.
 .br
 List all official, built-in policies for common systems.  Their file paths can then be provided using -P/--policy=<path/to/policy.txt>.
 
+.TP
+.B \-\-lookup=<alg1,alg2,...>
+.br
+Look up the security information of an algorithm(s) in the internal database.  Does not connect to a server.
+
 .TP
 .B -M, \-\-make-policy=<policy.txt>
 .br