fix to backslash quoting of glob pattern characters; allow newly-loaded compspecs to be used in more cases; fixes to the cross-compiling environment; avoid potential overflow in GLOBSORT processing

tests/new-exp.right

@@ -801,4 +801,10 @@ otwone
 argv[1] = </>
 argv[1] = </>
 
+1/##2/%3
+1/##2/##3
+1##2/%3
+1/%%2/#3
+1/%%2/%%3
+1%%2/#3
 ./new-exp.tests: line 1: ABXD: parameter unset

tests/new-exp.tests

@@ -655,5 +655,17 @@ patfunc foo
 # caused core dumps because of bad bracket expression parsing in bash-5.0
 eval : $'${x/#[0\xef\xbf\xbd\\Z[:]]}'
 
+a=1/%2/%3
+echo "${a/\%/##}"
+echo "${a//\%/##}"
+echo "${a/\/%/##}"
+
+b=1/#2/#3
+echo "${b/\#/%%}"
+echo "${b//\#/%%}"
+echo "${b/\/#/%%}"
+
+unset a b
+
 expect $0: 'ABXD: parameter unset'
 ${THIS_SH} -c 'recho ${ABXD:?"parameter unset"}' $0