Host completeness for clj-http-lite: with-open/slurp on shims, charset, exc classes

Gaps the clj-http-lite suite hit running over jolt-lang/http-client:

- with-open now closes a tagged-table stream shim via its .close method (was a
  :close field lookup that only matched the Janet-era tables).
- slurp accepts a bytevector / jolt byte-array / a byte input-stream shim and
  honors :encoding — clj-http-lite slurps response bodies and :as :stream bodies.
- (.getBytes s charset) and Charset/forName respect the charset (ISO-8859-1 etc.,
  one byte per char), not always UTF-8; Charset/forName returns the name string.
- (class e) reads the JVM :class off a throwable tagged-table, so clojure.test's
  (thrown? Class …) / (= Class (class e)) match a library's typed exceptions.
- Registered the HTTP/IO exception class names (IOException, UnknownHostException,
  SocketTimeoutException, SSLException, …) so the FQ literals self-evaluate.

All runtime .ss shims, no re-mint. Full gate green.

host/chez/host-class.ss

@@ -49,7 +49,16 @@
     ("Charset" . "java.nio.charset.Charset") ("Base64" . "java.util.Base64")
     ("Exception" . "java.lang.Exception")
     ("IllegalArgumentException" . "java.lang.IllegalArgumentException")
+    ("IllegalStateException" . "java.lang.IllegalStateException")
+    ("RuntimeException" . "java.lang.RuntimeException")
+    ("UnsupportedOperationException" . "java.lang.UnsupportedOperationException")
     ("InterruptedException" . "java.lang.InterruptedException")
+    ("IOException" . "java.io.IOException")
+    ("UnknownHostException" . "java.net.UnknownHostException")
+    ("ConnectException" . "java.net.ConnectException")
+    ("SocketTimeoutException" . "java.net.SocketTimeoutException")
+    ("MalformedURLException" . "java.net.MalformedURLException")
+    ("SSLException" . "javax.net.ssl.SSLException")
     ("Throwable" . "java.lang.Throwable")))
 (for-each
   (lambda (pair) (def-var! "clojure.core" (car pair) (cdr pair)))
@@ -74,4 +83,11 @@
   '("java.lang.Long" "java.lang.Integer" "java.lang.Double" "java.lang.Float"
     "java.lang.Number" "java.lang.String" "java.lang.Boolean" "java.lang.Character"
     "java.lang.Object"
+    ;; exception classes compared against (class e): (= java.net.SocketTimeoutException (class e))
+    "java.lang.Exception" "java.lang.Throwable" "java.lang.RuntimeException"
+    "java.lang.IllegalArgumentException" "java.lang.IllegalStateException"
+    "java.lang.UnsupportedOperationException" "java.io.IOException"
+    "java.net.UnknownHostException" "java.net.ConnectException"
+    "java.net.SocketTimeoutException" "java.net.MalformedURLException"
+    "javax.net.ssl.SSLException"
     "clojure.lang.Keyword" "clojure.lang.Symbol" "clojure.lang.Ratio" "clojure.lang.Atom"))