add variable for division by zero

src/stage2/Langspec.man.1

@@ -1,4 +1,4 @@
-My Language V0.2.a25a 0000000 00-00-0000
+My Language V0.2.a25b 0000000 00-00-0000
 Depricated; updates deffered until Alpha
 ======================================
 
@@ -332,6 +332,7 @@ clog : the C++ log file
 φ : (1+√5)/2, double. (the variable "phi" is antireserved for i.e. user defined approximations. ϕ is antireserved for i.e. the second angle in a spherical coordinate system)
 ∞ , infinity : infinity. Currently a double, may be changed to a special, more compact type for special numbers.
 ↯ , notanumber : quiet Not a Number. Currently a double, may be changed to a special, more compact type for special numbers.
+⓿ , divby0 : the NAN value for division by zero
 ⊤ , true : bool of 1
 ⊥ , false : bool of 0
 Ⅱ , ternary : bool of -1
@@ -593,7 +594,7 @@ a name may not contain a number as the first character
 0 1 2 3 4 5 6 7 8 9
 
 a name may not overlap exactly with a special variable.
-stdin stdout stderr � NULL ∅ emptyset ⅈ imaginary_unit_i ℯ π φ ∞ infinity ↯ notanumber ⊤ true ⊥ false Ⅱ ternary
+stdin stdout stderr � NULL ∅ emptyset ⅈ imaginary_unit_i ℯ π φ ∞ infinity ↯ notanumber ⓿ divby0 ⊤ true ⊥ false Ⅱ ternary
 
 a name may not overlap exactly with a builtin function
 [set of all functions]