use name as GLOBSORT secondary sort key; new GLOBSORT sort specifier: `numeric'; let readonly and export work on local variables at previous scopes for both array and scalar variables

doc/bashref.bt

@@ -3,14 +3,14 @@
 \entry{break}{50}{\code {break}}
 \entry{cd}{50}{\code {cd}}
 \entry{continue}{50}{\code {continue}}
-\entry{eval}{50}{\code {eval}}
+\entry{eval}{51}{\code {eval}}
 \entry{exec}{51}{\code {exec}}
 \entry{exit}{51}{\code {exit}}
 \entry{export}{51}{\code {export}}
 \entry{false}{51}{\code {false}}
 \entry{getopts}{51}{\code {getopts}}
 \entry{hash}{52}{\code {hash}}
-\entry{pwd}{52}{\code {pwd}}
+\entry{pwd}{53}{\code {pwd}}
 \entry{readonly}{53}{\code {readonly}}
 \entry{return}{53}{\code {return}}
 \entry{shift}{53}{\code {shift}}
@@ -39,11 +39,11 @@
 \entry{readarray}{67}{\code {readarray}}
 \entry{source}{67}{\code {source}}
 \entry{type}{67}{\code {type}}
-\entry{typeset}{67}{\code {typeset}}
+\entry{typeset}{68}{\code {typeset}}
 \entry{ulimit}{68}{\code {ulimit}}
 \entry{unalias}{69}{\code {unalias}}
 \entry{set}{69}{\code {set}}
-\entry{shopt}{73}{\code {shopt}}
+\entry{shopt}{74}{\code {shopt}}
 \entry{dirs}{106}{\code {dirs}}
 \entry{popd}{106}{\code {popd}}
 \entry{pushd}{106}{\code {pushd}}