Remove MSVC6 support.

Don't support this compiler any more, this allows to get rid of tons of
MSVC6-specific workarounds, in particular we can now use Bind() and natural
template functions calls in the library code.

Also remove MSVC6 project and solution files and don't generate them when
bakefile_gen is ran any more (removing the remaining occurrences of msvc6prj
from the bakefiles results in weird bake-time errors, so it's simpler to just
leave them there).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76532 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/private/sckaddr.h

@@ -50,11 +50,7 @@ union wxSockAddressStorage
 // ----------------------------------------------------------------------------
 
 // helper class mapping sockaddr_xxx types to corresponding AF_XXX values
-//
-// FIXME-VC6: we could leave the template undefined if not for VC6 which
-//            absolutely does need to have a generic version defining the
-//            template "interface" to compile the code below
-template <class T> struct AddressFamily { enum { value = AF_UNSPEC }; };
+template <class T> struct AddressFamily;
 
 template <> struct AddressFamily<sockaddr_in> { enum { value = AF_INET }; };
 
@@ -249,11 +245,8 @@ private:
         m_len = len;
     }
 
-    // FIXME-VC6: VC6 doesn't grok Foo<T>() call syntax so we need the extra
-    //            dummy parameter of type T, use the macros in sckaddr.cpp to
-    //            hide it
     template <class T>
-    T *Alloc(T *)
+    T *Alloc()
     {
         DoAlloc(sizeof(T));
 
@@ -261,7 +254,7 @@ private:
     }
 
     template <class T>
-    T *Get(T *) const
+    T *Get() const
     {
         wxCHECK_MSG( static_cast<int>(m_family) == AddressFamily<T>::value,
                      NULL,