Fix regex for non-gnu versions of awk.

Recent versions of gawk have upgraded the regex processing with l10n
based character classes. Replace use of these so other versions of awk
can be used.

getssl

@@ -1027,7 +1027,7 @@ info() { # write out info as long as the quiet flag has not been set.
 
 json_awk() { # AWK json converter used for API2 - needs tidying up ;)
 # shellcheck disable=SC2086
-echo $1 | awk '
+echo "$1" | tr -d '\n' | awk '
 {
   tokenize($0) # while(get_token()) {print TOKEN}
   if (0 == parse()) {
@@ -1173,8 +1173,8 @@ function scream(msg) {
 }
 
 function tokenize(a1,pq,pb,ESCAPE,CHAR,STRING,NUMBER,KEYWORD,SPACE) {
-  SPACE="[[:space:]]+"
-  gsub(/"[^[:cntrl:]"\\]*((\\[^u[:cntrl:]]|\\u[0-9a-fA-F]{4})[^[:cntrl:]"\\]*)*"|-?(0|[1-9][0-9]*)([.][0-9]*)?([eE][+-]?[0-9]*)?|null|false|true|[[:space:]]+|./, "\n&", a1)
+  SPACE="[ \t\n]+"
+  gsub(/"[^\001-\037"\\]*((\\[^u\001-\037]|\\u[0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F])[^\001-\037"\\]*)*"|-?(0|[1-9][0-9]*)([.][0-9]*)?([eE][+-]?[0-9]*)?|null|false|true|[ \t\n]+|./, "\n&", a1)
   gsub("\n" SPACE, "\n", a1)
   sub(/^\n/, "", a1)
   ITOKENS=0 # get_token() helper