doc: correct ssh_channel_read_timeout units

Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

include/libssh/libssh.h

@@ -377,7 +377,7 @@ LIBSSH_API int ssh_channel_open_x11(ssh_channel channel, const char *orig_addr,
 LIBSSH_API int ssh_channel_poll(ssh_channel channel, int is_stderr);
 LIBSSH_API int ssh_channel_poll_timeout(ssh_channel channel, int timeout, int is_stderr);
 LIBSSH_API int ssh_channel_read(ssh_channel channel, void *dest, uint32_t count, int is_stderr);
-LIBSSH_API int ssh_channel_read_timeout(ssh_channel channel, void *dest, uint32_t count, int is_stderr, int timeout);
+LIBSSH_API int ssh_channel_read_timeout(ssh_channel channel, void *dest, uint32_t count, int is_stderr, int timeout_ms);
 LIBSSH_API int ssh_channel_read_nonblocking(ssh_channel channel, void *dest, uint32_t count,
     int is_stderr);
 LIBSSH_API int ssh_channel_request_env(ssh_channel channel, const char *name, const char *value);

src/channels.c

@@ -2755,8 +2755,8 @@ int ssh_channel_read(ssh_channel channel, void *dest, uint32_t count, int is_std
  *
  * @param[in]  is_stderr   A boolean value to mark reading from the stderr flow.
  *
- * @param[in]  timeout  A timeout in seconds. A value of -1 means infinite
- *                      timeout.
+ * @param[in]  timeout_ms  A timeout in milliseconds. A value of -1 means
+ *                         infinite timeout.
  *
  * @return              The number of bytes read, 0 on end of file or SSH_ERROR
  *                      on error. In nonblocking mode it Can return 0 if no data