tinc: fix spelling and update manpage (thanks unobe)

Update tinc(8) man page to:
    1.  state the implementation aligns with 1.0.36 of tinc.org;
    2.  use same hostname as mentioned in usage line.
  Fix typos in tinc.c.

sys/man/8/tinc

@@ -29,7 +29,7 @@ tinc - mesh peer to peer VPN
 .SH DESCRIPTION
 Tinc implements the mesh peer to peer VPN protocol from
 .I https://www.tinc-vpn.org/
-as of version 1.0.32. Within a tinc VPN one can reach all
+as of version 1.0.36. Within a tinc VPN one can reach all
 the subnets of all hosts within the network even when not
 directly connected to the owning host of the subnet.
 .PP
@@ -110,7 +110,7 @@ for the VPN.
 .TP
 .B -n
 Sets our hostname to
-.IR myhost .
+.IR myname .
 .SH "SEE ALSO"
 .IR rsa (8),
 .IR ip (3)

sys/src/cmd/ip/tinc.c

@@ -76,7 +76,7 @@ struct Edge
 	Host	*src;
 	Host	*dst;
 	Edge	*next;	/* next edge on src */
-	Edge	*rev;	/* reverse drection edge */
+	Edge	*rev;	/* reverse direction edge */
 
 	uchar	ip[IPaddrlen];
 	int	port;
@@ -1135,7 +1135,7 @@ metaauth(Conn *c)
 	if(n != 6 || atoi(f[0]) != META_KEY || strlen(f[5]) != 2*n2)
 		return -1;
 	if(atoi(f[1]) != EVP_AES256CFB || atoi(f[2]) != EVP_SHA256){
-		fprint(2, "%s uses unknown cipher/digest agorithms: %s %s\n",
+		fprint(2, "%s uses unknown cipher/digest algorithms: %s %s\n",
 			c->host->name, f[1], f[2]);
 		return -1;
 	}