Removed compatibility option LUA_COMPAT_GCPARAMS

The meaning of different GC parameters changed, so there is point in
supporting old values for them. The new code simply ignores the
parameters when changing the GC mode, so the incompatibility is small.

testes/gengc.lua

@@ -24,12 +24,12 @@ do
   assert(not T or (T.gcage(U) == "touched1" and T.gcage(U[1]) == "new"))
 
   -- both U and the table survive one more collection
-  collectgarbage("step", 0)
+  collectgarbage("step")
   assert(not T or (T.gcage(U) == "touched2" and T.gcage(U[1]) == "survival"))
 
   -- both U and the table survive yet another collection
   -- now everything is old
-  collectgarbage("step", 0)
+  collectgarbage("step")
   assert(not T or (T.gcage(U) == "old" and T.gcage(U[1]) == "old1"))
 
   -- data was not corrupted
@@ -46,10 +46,10 @@ do
   assert(not T or T.gcage(old) == "old")
   setmetatable(old, {})    -- new table becomes OLD0 (barrier)
   assert(not T or T.gcage(getmetatable(old)) == "old0")
-  collectgarbage("step", 0)   -- new table becomes OLD1 and firstold1
+  collectgarbage("step")   -- new table becomes OLD1 and firstold1
   assert(not T or T.gcage(getmetatable(old)) == "old1")
   setmetatable(getmetatable(old), {__gc = foo})  -- get it out of allgc list
-  collectgarbage("step", 0)   -- should not seg. fault
+  collectgarbage("step")   -- should not seg. fault
 end
 
 
@@ -65,18 +65,18 @@ do   -- bug in 5.4.0
     A[1] = obj     -- anchor object
     assert(not T or T.gcage(obj) == "old1")
     obj = nil      -- remove it from the stack
-    collectgarbage("step", 0)   -- do a young collection
+    collectgarbage("step")   -- do a young collection
     print(getmetatable(A[1]).x)   -- metatable was collected
   end
 
   collectgarbage()   -- make A old
   local obj = {}     -- create a new object
-  collectgarbage("step", 0)   -- make it a survival
+  collectgarbage("step")   -- make it a survival
   assert(not T or T.gcage(obj) == "survival")
   setmetatable(obj, {__gc = gcf, x = "+"})   -- create its metatable
   assert(not T or T.gcage(getmetatable(obj)) == "new")
   obj = nil   -- clear object
-  collectgarbage("step", 0)   -- will call obj's finalizer
+  collectgarbage("step")   -- will call obj's finalizer
 end
 
 
@@ -94,13 +94,13 @@ do   -- another bug in 5.4.0
     end
   )
   local _, f = coroutine.resume(co)   -- create closure over 'x' in coroutine
-  collectgarbage("step", 0)   -- make upvalue a survival
+  collectgarbage("step")   -- make upvalue a survival
   old[1] = {"hello"}    -- 'old' go to grayagain as 'touched1'
   coroutine.resume(co, {123})     -- its value will be new
   co = nil
-  collectgarbage("step", 0)   -- hit the barrier
+  collectgarbage("step")   -- hit the barrier
   assert(f() == 123 and old[1][1] == "hello")
-  collectgarbage("step", 0)   -- run the collector once more
+  collectgarbage("step")   -- run the collector once more
   -- make sure old[1] was not collected
   assert(f() == 123 and old[1][1] == "hello")
 end
@@ -112,12 +112,12 @@ do   -- bug introduced in commit 9cf3299fa
   assert(not T or T.gcage(t) == "old")
   t[1] = {10}
   assert(not T or (T.gcage(t) == "touched1" and T.gccolor(t) == "gray"))
-  collectgarbage("step", 0)   -- minor collection
+  collectgarbage("step")   -- minor collection
   assert(not T or (T.gcage(t) == "touched2" and T.gccolor(t) == "black"))
-  collectgarbage("step", 0)   -- minor collection
+  collectgarbage("step")   -- minor collection
   assert(not T or T.gcage(t) == "old")   -- t should be black, but it was gray
   t[1] = {10}      -- no barrier here, so t was still old
-  collectgarbage("step", 0)   -- minor collection
+  collectgarbage("step")   -- minor collection
   -- t, being old, is ignored by the collection, so it is not cleared
   assert(t[1] == nil)   -- fails with the bug
 end
@@ -144,13 +144,13 @@ do
          T.gcage(debug.getuservalue(U)) == "new")
 
   -- both U and the table survive one more collection
-  collectgarbage("step", 0)
+  collectgarbage("step")
   assert(T.gcage(U) == "touched2" and
          T.gcage(debug.getuservalue(U)) == "survival")
 
   -- both U and the table survive yet another collection
   -- now everything is old
-  collectgarbage("step", 0)
+  collectgarbage("step")
   assert(T.gcage(U) == "old" and
          T.gcage(debug.getuservalue(U)) == "old1")