[dcl.init, dcl.stc] Move specification as to where extern is allowed into [dcl.stc]

Author: sdkrystian

source/declarations.tex

@@ -406,7 +406,8 @@
 \indextext{restriction!\idxcode{extern}}%
 The \tcode{extern} specifier shall be applied only to the declaration of a variable
 or function. The \tcode{extern} specifier shall not be used in the
-declaration of a class member or function parameter.
+declaration of a class member, function parameter, or block-scope variable with
+an \grammarterm{initializer}.
 \indextext{\idxcode{extern}!linkage of}%
 \indextext{consistency!linkage}%
 For the linkage of a name declared with an \tcode{extern} specifier,
@@ -4135,10 +4136,6 @@
 and~\ref{stmt.dcl}.
 \end{note}
 
-\pnum
-A declaration of a block-scope variable with external or internal
-linkage that has an \grammarterm{initializer} is ill-formed.
-
 \pnum
 \indextext{initialization!default}%
 \indextext{variable!indeterminate uninitialized}%