stockpile: New command, counterpart of fleetadd, wingadd, army

Signed-off-by: Markus Armbruster <armbru@pond.sub.org>

info/stockpile.t

@@ -0,0 +1,43 @@
+.TH Command STOCKPILE
+.NA stockpile "Designate members of a \*Qstockpile\*U"
+.LV Expert
+.SY "stockpile <STOCKPILE> <NUKE/STOCKPILE>"
+The stockpile command is used to specify the stockpile groupings
+of your nukes.
+.s1
+.EX stockpile <STOCKPILE> <NUKE/STOCKPILE>
+In the syntax <STOCKPILE> is the alphabetic character to be used as the
+stockpile designation.
+This character can be chosen from the set of
+upper or lower case a-z and tilde (~).
+The pseudo-stockpile specification tilde
+specifies all nukes not currently in any stockpile.
+.s1
+The specification of nukes, <NUKE/STOCKPILE>,
+can have one of several syntaxes:
+.NF
+example     meaning
+-------     -------
+23          nuke 23
+2/14/23     nukes 2, 14, and 23
+c           all nukes currently in stockpile `c'
+~           all nukes currently in the \*Qnull\*U stockpile
+2,3         all nukes in sector 2,3
+-1:3,0:2    all nukes in the square area bounded by -1,0 & 3,2
+.FI
+All stockpiles, (with the exception of the `~' stockpile),
+are limited to some maximum size
+and you will be informed how many nukes can be added
+when this command is run.
+.s1
+Having nukes organized into stockpiles can be very helpful in
+loading, moving, etc.,
+in that fewer commands are required to perform these commands
+on groups of nukes if they can be specified by stockpile number.
+.s1
+Note that you can remove nukes from a stockpile by adding them to
+the `~' stockpile.  e.g.
+.EX stockpile ~ A
+This command would purge all nukes from stockpile `A'.
+.s1
+.SA "nuke, transport, Nukes"