Allow for ~ in both pv name and value.

src/dbtools/dbLoadRecords_lex.l

@@ -1,5 +1,5 @@
 
-pvname	[a-zA-Z0-9_\-:\.\[\]<>;]
+pvname	[a-zA-Z0-9_~\-:\.\[\]<>;]
 value	[a-zA-Z0-9_\,\^~\./\*#\[\]%: ;!|\'\-&\(\)@\?\+<>=\$\{\}]
 
 %{

src/dbtools/dbLoadTemplate_lex.l

@@ -1,5 +1,5 @@
 
-value	[a-zA-Z0-9_\,\./\*#\[\]%: ;!|\-&\(\)@\?\+<>=\$]
+value	[a-zA-Z0-9_~\,\./\*#\[\]%: ;!|\-&\(\)@\?\+<>=\$]
 word	[a-zA-Z0-9_\.\^~/\*#\[\]%:;!|\-&\$\(\)@\?\+<>]
 par [\"\']