Part of the fix for https://github.com/eclipse-ee4j/jsp-api/issues/44

The JSP specification needs to define additional default packages for
its EL environment. Add text to the EL spec that explicitly allows this.

spec/src/main/asciidoc/ELSpec.adoc

diff --git a/spec/src/main/asciidoc/ELSpec.adoc b/spec/src/main/asciidoc/ELSpec.adoc
index e464565..6758f1c 100644
--- a/spec/src/main/asciidoc/ELSpec.adoc
+++ b/spec/src/main/asciidoc/ELSpec.adoc
@@ -1329,6 +1329,12 @@
 must be public and has already been imported) for static methods apply
 to the constructor calls.
 
+==== Additional Default Imports
+
+When EL is used in conjunction with another specification, for example Jakarta
+Server Pages, that specification may define further packages, in addition to
+`java.lang.*`, that are imported by default into the EL environment.
+
 === Type Conversion
 
 Every expression is evaluated in the context