[intro.refs] Move nicknames for standards to relevant subclauses

Author: jensmaurer

source/intro.tex

@@ -69,14 +69,6 @@
 The Unicode Consortium. \doccite{The Unicode Standard}.
 Available from: \url{https://www.unicode.org/versions/latest/}
 \end{itemize}
-
-\pnum
-The operating system interface described in ISO/IEC 9945:2009 is
-hereinafter called \defn{POSIX}.
-
-\pnum
-The ECMAScript Language Specification described in Standard Ecma-262 is
-hereinafter called \defn{ECMA-262}.
 \indextext{references!normative|)}
 
 \rSec0[intro.defs]{Terms and definitions}

source/lib-intro.tex

@@ -45,6 +45,10 @@
 \ref{thread}            & Concurrency support library \\
 \end{floattable}
 
+\pnum
+The operating system interface described in ISO/IEC/IEEE 9945:2009 is
+hereinafter called \defn{POSIX}.
+
 \pnum
 The language support library\iref{support} provides components that are
 required by certain parts of the \Cpp{} language,

source/regex.tex

@@ -33,6 +33,10 @@
 \ref{re.grammar}    &   Grammar                     &                       \\
 \end{libsumtab}
 
+\pnum
+The ECMAScript Language Specification described in Standard Ecma-262
+is called \defn{ECMA-262} in this Clause.
+
 \rSec1[re.req]{Requirements}
 
 \pnum