add man pages + add -n option to nobotgate-access

doc/nobotgate.1

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+.TH nobotgate 3
+.SH NAME
+nobotgate \- block bots using http header authentication
+.SH SYNOPSIS
+nobotgate TOKENFILE VALID INVALID
+.SH DESCRIPTION
+nobotgate-access is meant to run under a superserver such
+as tcpserver(1) or inetd(8).
+It reads http request headers from stdin and tries find a
+HTTP Bearer token. If no token is found or the token is not
+listed in TOKENFILE, it exec's into INVALID.
+If a token is found and the token is listed in
+TOKENFILE, it exec's into VALID.
+.SH "TOKENFILE FORMAT"
+The tokenfile is parsed line by line. Empty lines are
+ignored.
+The token begins at line start and ends at the first space
+in the line(the space is not part of the token of course).
+.SH "EXAMPLE"
+An example tokenfile:
+  1234 this is bob's token
+  abc223-23cm ci/cd token
+.SH "SEE ALSO"
+nobotgate-access(1), tcpserver(1), inetd(8)