fixup Optional libraries - use --without and add -lib

configure

@@ -168,11 +168,11 @@ while : ; do
     -no-graph|--no-graph) graph_wanted=no;;
     -without-graphics-libs|--without-graphics-lib) graph_wanted=no;;
     -with-graphics-lib|--with-graphics-lib) graph_wanted=yes;;
-    -no-unix|--no-unix) unix_wanted=no;;
-    -with-unix|--with-unix) ;; # Default is to build
-    -no-str|--no-str) str_wanted=no;;
-    -with-str|--with-str) ;; # Default is to build
-    -no-vmthreads|--no-vmthreads) vmthreads_wanted=no;;
+    -without-unix-lib|--without-unix-lib) unix_wanted=no;;
+    -with-unix-lib|--with-unix-lib) ;; # Default is to build
+    -without-str-lib|--without-str-lib) str_wanted=no;;
+    -with-str-lib|--with-str-lib) ;; # Default is to build
+    -without-vmthreads|--without-vmthreads) vmthreads_wanted=no;;
     -with-vmthreads|--with-vmthreads) vmthreads_wanted=yes;;
     -without-systhreads|--without-systhreads) pthread_wanted=no;;
     -with-systhreads|--with-systhreads) pthread_wanted=yes;;
@@ -196,12 +196,16 @@ while : ; do
         with_instrumented_runtime=true;;
     -no-instrumented-runtime|--no-instrumented-runtime)
         with_instrumented_runtime=false;;
-    -debugger|--debugger)
+    -with-debugger|--with-debugger)
         with_debugger="yes";;
+    -without-debugger|--without-debugger)
+        with_debugger="no";;
     -no-debugger|--no-debugger)
         with_debugger="no";;
-    -ocamldoc|--ocamldoc)
+    -with-ocamldoc|--with-ocamldoc)
         with_ocamldoc="yes";;
+    -without-ocamldoc|--without-ocamldoc)
+        with_ocamldoc="no";;
     -no-ocamldoc|--no-ocamldoc)
         with_ocamldoc="no";;
     -no-ocamlbuild|--no-ocamlbuild)