Added --fname-as-vhost to the man page.

goaccess.1

@@ -1,4 +1,4 @@
-.TH goaccess 1 "AUGUST 2022" GNU+Linux "User Manuals"
+.TH goaccess 1 "SEPTEMBER 2022" GNU+Linux "User Manuals"
 .SH NAME
 goaccess \- fast web log analyzer and interactive viewer.
 .SH SYNOPSIS
@@ -642,6 +642,12 @@ Enable parsing and displaying the given panel.
   MIME_TYPE
   TLS_TYPE
 .TP
+\fB\-\-fname-as-vhost=<regex>
+Use log filename(s) as virtual host(s). POSIX regex is passed to extract
+the virtual host from the filename. e.g.,
+.I --fname-as-vhost='[a-z]*\.[a-z]*'
+can be used to extract awesome.com.log => awesome.com.
+.TP
 \fB\-\-hide-referrer=<NEEDLE>
 Hide a referrer but still count it. Wild cards are allowed in the needle. i.e.,
 *.bing.com.