various small fixes to the venti-*(2) man pages

Reference: /n/sources/patch/venti-man-2-nits
Date: Tue Mar 25 04:58:14 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/man/2/venti-log	Tue Mar 25 04:57:45 2014
+++ /sys/man/2/venti-log	Tue Mar 25 04:57:44 2014
@@ -8,6 +8,7 @@
 vtlognames,
 vtlogopen,
 vtlogprint,
+vtlogvprint,
 vtlogremove,
 vtlogopen,
 ventilogging \- Venti logs
@@ -27,6 +28,9 @@
 void	vtlogprint(VtLog *log, char *fmt, ...);
 .PP
 .B
+void	vtlogvprint(VtLog *log, va_list arg);
+.PP
+.B
 void	vtlogclose(VtLog *log);
 .PP
 .B
@@ -68,7 +72,9 @@
 .IR vtlogopen .
 .PP
 .I Vtlogprint
-writes to
+and
+.I vtlogvprint
+write to
 .IR log ,
 which must be open.
 .PP
--- /sys/man/2/venti-packet	Tue Mar 25 04:57:47 2014
+++ /sys/man/2/venti-packet	Tue Mar 25 04:57:46 2014
@@ -122,7 +122,7 @@
 .IR p .
 This may be larger than the number of bytes stored
 in
-.IR p
+.I p
 because fragments may not be filled completely.
 .PP
 .I Packetcmp
--- /sys/man/2/venti-client	Tue Mar 25 04:57:50 2014
+++ /sys/man/2/venti-client	Tue Mar 25 04:57:48 2014
@@ -1,6 +1,6 @@
 .TH VENTI-CLIENT 2
 .SH NAME
-vtconnect, vthello, vtread, vtwrite, vtreadpacket, vtwritepacket, vtsync, vtping, vtrpc, ventidoublechecksha1 \- Venti client
+vtconnect, vthello, vtread, vtwrite, vtreadpacket, vtwritepacket, vtsync, vtping, vtgoodbye, vtrpc, ventidoublechecksha1 \- Venti client
 .SH SYNOPSIS
 .ft L
 #include <u.h>
@@ -50,6 +50,9 @@
 int	vtping(VtConn *z)
 .PP
 .B
+int	vtgoodbye(VtConn *z)
+.PP
+.B
 extern int ventidoublechecksha1;  /* default 1 */
 .SH DESCRIPTION
 These routines execute the client side of the 
@@ -59,7 +62,7 @@
 .I Vtrpc
 executes a single Venti RPC transaction, sending the request 
 packet
-.IR p
+.I p
 and then waiting for and returning the response packet.
 .I Vtrpc
 will set the tag in the packet.
@@ -141,6 +144,9 @@
 .PP
 .I Vtping
 executes a ping transaction with the server.
+.PP
+.I Vtgoodbye
+closes the connection.
 .PP
 By default,
 .I vtread