Merge pull request #2400 from dekkers/doc-server-preferences

Add --server-preference alias to documentation

Author: drwetter

doc/testssl.1

@@ -143,7 +143,7 @@ Any single check switch supplied as an argument prevents testssl\.sh from doing
 .P
 \fB\-p, \-\-protocols\fR checks TLS/SSL protocols SSLv2, SSLv3, TLS 1\.0 through TLS 1\.3 and for HTTP: SPDY (NPN) and ALPN, a\.k\.a\. HTTP/2\. For TLS 1\.3 several drafts (from 18 on) and final are supported and being tested for\.
 .P
-\fB\-P, \-\-preference\fR displays the servers preferences: cipher order, with used openssl client: negotiated protocol and cipher\. If there's a cipher order enforced by the server it displays it for each protocol (openssl+sockets)\. If there's not, it displays instead which ciphers from the server were picked with each protocol\.
+\fB\-P, \-\-server\-preference, \-\-preference\fR displays the servers preferences: cipher order, with used openssl client: negotiated protocol and cipher\. If there's a cipher order enforced by the server it displays it for each protocol (openssl+sockets)\. If there's not, it displays instead which ciphers from the server were picked with each protocol\.
 .P
 \fB\-S, \-\-server_defaults\fR displays information from the server hello(s):
 .IP "\[ci]" 4

doc/testssl.1.html

@@ -175,7 +175,7 @@ Any single check switch supplied as an argument prevents testssl.sh from doing a
 
 `-p, --protocols`  checks TLS/SSL protocols SSLv2, SSLv3, TLS 1.0 through TLS 1.3 and for HTTP: SPDY (NPN) and ALPN, a.k.a. HTTP/2. For TLS 1.3 several drafts (from 18 on) and final are supported and being tested for.
 
-`-P, --preference`  displays the servers preferences: cipher order, with used openssl client: negotiated protocol and cipher. If there's a cipher order enforced by the server it displays it for each protocol (openssl+sockets). If there's not, it displays instead which ciphers from the server were picked with each protocol.
+`-P, --server-preference, --preference`  displays the servers preferences: cipher order, with used openssl client: negotiated protocol and cipher. If there's a cipher order enforced by the server it displays it for each protocol (openssl+sockets). If there's not, it displays instead which ciphers from the server were picked with each protocol.
 
 `-S, --server_defaults`  displays information from the server hello(s):