update download and changelog for v2.081.0

Author: MartinNowak

VERSION

@@ -1 +1 @@
-2.080.1
+2.081.0

changelog/2.081.0_pre.dd

@@ -696,6 +696,7 @@ $(LI $(BUGZILLA 18068): No file names and line numbers in stack trace)
 $(LI $(BUGZILLA 18821): DMD segfault when doing unsafe operation outside of any function)
 $(LI $(BUGZILLA 18905): [Reg 2.079] C++ classes can no longer be used with -betterC)
 $(LI $(BUGZILLA 18936): Internal error: dmd/backend/cgxmm.c 684)
+$(LI $(BUGZILLA 19024): [REG 2.081-beta] AssertError@dmd/dsymbolsem.d$(LPAREN)4317$(RPAREN): Assertion failure)
 )
 $(BUGSTITLE_BUGZILLA DMD Compiler bugs,
 
@@ -707,6 +708,7 @@ $(LI $(BUGZILLA 12807): UFCS checks "alias this" attributes even when not called
 $(LI $(BUGZILLA 13435): Strange error if struct is a class member and opAssign applied)
 $(LI $(BUGZILLA 13741): std.traits.moduleName & packageName do not work with functions that have parameters)
 $(LI $(BUGZILLA 14178): C++ linux name mangling does not handle standard abbreviations for const types)
+$(LI $(BUGZILLA 14739): Immutable alias to template triggers dmd assert)
 $(LI $(BUGZILLA 15068): wrong error message on attempting to use type as template)
 $(LI $(BUGZILLA 15388): extern$(LPAREN)C++$(RPAREN) - typeof$(LPAREN)null$(RPAREN) should mangle as nullptr_t)
 $(LI $(BUGZILLA 15475): Ddoc code sample with unbalanced paren comes out as macro)

download.dd

@@ -210,8 +210,8 @@ Macros:
 
     DMDV2=$(LATEST)
 
-    _=BETA=$(COMMENT $0)
-    BETA=$0
+    BETA=$(COMMENT $0)
+    _=BETA=$0
     B_DMDV2=2.081.0
     B_SUFFIX=rc.1