go: port item effects — potions, scrolls, options, call_it

- potions.c completed: quaff with all 14 potion effects, the PACT
  standard-fuse table (do_pot), raise_level; the see-invisible fruit-
  juice message is computed at quaff time as in C
- scrolls.c in full: read_scroll with all 18 scroll effects including
  the magic-mapping map rewrite and identify dispatch, uncurse
- options.c in full: the interactive options screen, get_bool/get_str/
  get_inv_t/get_sf editors, ROGUEOPTS parsing (prefix matching, no-
  prefixed booleans, ~ expansion), strucpy
- misc.c call_it via the get_str line editor
- turn_see gets a DaemonID (C casts it to a fuse callback for the
  monster-detection potion)

Tests: healing/confusion potions with fuse burn-down, enchant armor,
hold monster, slow-monster zap, ROGUEOPTS parsing, and a regression
test documenting the C wake_monster ISGREED/ISHELD quirk the port
keeps faithfully.

game/misc.go

@@ -416,6 +416,21 @@ func (g *RogueGame) getDir() bool {
 	return true
 }
 
+// callIt calls an object something after use (misc.c call_it).
+func (g *RogueGame) callIt(info *ObjInfo) {
+	if info.Know {
+		info.Guess = ""
+	} else if info.Guess == "" {
+		g.msg("%s", g.chooseTerse("call it: ", "what do you want to call it? "))
+		buf := ""
+		if g.getStr(&buf, g.scr.Std) == Norm {
+			if buf != "" {
+				info.Guess = buf
+			}
+		}
+	}
+}
+
 // thingList is misc.c rnd_thing()'s static table.
 var thingList = []byte{
 	Potion, Scroll, Ring, Stick, Food, Weapon, Armor, Stairs, Gold, Amulet,