sync latest perl mods (with updated deps)

doc/binary_c2.lyx

@@ -2027,7 +2027,7 @@ Perl
 
 \end_inset
 
- (note that below I use version 5.31.11 – a newer version is probably available).
+.
  
 \begin_inset listings
 inline false
@@ -2035,6 +2035,11 @@ status open
 
 \begin_layout Plain Layout
 
+wget --no-check-certificate -O - http://install.perlbrew.pl | bash
+\end_layout
+
+\begin_layout Plain Layout
+
 export NTHREADS=`cat /proc/cpuinfo |grep cpu
 \backslash
  famil|wc -l`
@@ -2057,14 +2062,9 @@ export LATEST_PERL=`perlbrew available | grep
 
 \begin_layout Plain Layout
 
-wget --no-check-certificate -O - http://install.perlbrew.pl | bash
-\end_layout
-
-\begin_layout Plain Layout
-
-perlbrew -v install perl-5.31.11 --thread --multi --64bitall --notest -Dusethreads
- -Duselargefiles -Dcccdlflags=-fPIC -Dpager=/usr/bin/sensible-pager -Doptimize="
--O3 -mtune=generic" -Duseshrplib -j $NTHREADS
+perlbrew -v install $LATEST_PERL --thread --multi --64bitall --notest -Dusethrea
+ds -Duselargefiles -Dcccdlflags=-fPIC -Dpager=/usr/bin/sensible-pager -Doptimize
+="-O3 -mtune=generic" -Duseshrplib -j $NTHREADS
 \end_layout
 
 \end_inset