Add winshock to documentation

Author: drwetter

doc/testssl.1

@@ -385,6 +385,9 @@ Security headers (X\-Frame\-Options, X\-XSS\-Protection, Expect\-CT,\.\.\. , CSP
 \fB\-L, \-\-lucky13\fR Checks for LUCKY13 vulnerability\. It checks for the presence of CBC ciphers in TLS versions 1\.0 \- 1\.2\.
 .
 .P
+\fB\-WS, \-\-winshock\fR Checks for Winshock vulnerability\. It tests for absence of GCM ciphers which were introduced in the fix and correlates that with the server banner\.
+.
+.P
 \fB\-4, \-\-rc4, \-\-appelbaum\fR Checks which RC4 stream ciphers are being offered\.
 .
 .SS "OUTPUT OPTIONS"

doc/testssl.1.html

@@ -254,6 +254,8 @@ Also for multiple server certificates are being checked for as well as for the c
 
 `-L, --lucky13`                 Checks for LUCKY13 vulnerability. It checks for the presence of CBC ciphers in TLS versions 1.0 - 1.2.
 
+`-WS, --winshock`               Checks for Winshock vulnerability. It tests for absence of GCM ciphers which were introduced in the fix and correlates that with the server banner.
+
 `-4, --rc4, --appelbaum`        Checks which RC4 stream ciphers are being offered.