Update runtime files.

runtime/doc/terminal.txt

@@ -1,4 +1,4 @@
-*terminal.txt*	For Vim version 8.0.  Last change: 2018 Feb 20
+*terminal.txt*	For Vim version 8.0.  Last change: 2018 Mar 09
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -20,6 +20,7 @@ If the result is "1" you have it.
       Terminal Modes			|Terminal-mode|
       Cursor style			|terminal-cursor-style|
       Special keys			|terminal-special-keys|
+      Session				|terminal-session|
       Unix				|terminal-unix|
       MS-Windows			|terminal-ms-windows|
 2. Remote testing		|terminal-testing|
@@ -163,6 +164,8 @@ Syntax ~
 					cannot be |abandon|ed.
 			++hidden	Open the terminal in a hidden buffer,
 					no window will be used.
+			++norestore	Do not include this terminal window
+					in a session file.
 			++rows={height} Use {height} for the terminal window
 					height.  If the terminal uses the full
 					Vim height (no window above or below
@@ -286,6 +289,22 @@ is inverted.  Since Vim cannot detect this, the terminal window cursor
 blinking will also be inverted.
 
 
+Session ~
+							*terminal-session*
+A terminal window will be restored when using a session file, if possible and
+wanted.
+
+If "terminal" was removed from 'sessionoptions' then no terminal windows will
+be restored.
+
+If the job in the terminal was finished the window will not be restored.
+
+If the terminal can be restored, the command that was used to open it will be
+used again.  To change this use the |term_setrestore()| function.  This can
+also be used to not restore a specific terminal by setting the command to
+"NONE".
+
+
 Special keys ~
 							*terminal-special-keys*
 Since the terminal emulator simulates an xterm, only escape sequences that