CONFIG: adjust make scripts for darwin

- handling of dead links (find -L -delete unsupported)

- remove ignore case flag on 's/../../i' used in have_scotch script.
  It is unneeded and not tolerated by Darwin's sed.

- avoid embedded comments in EXE_INC (Make/options files), which do
  not work well with the OSX LLVM cpp.
  It strips out the comments but also removes the continuation char.

STYLE: adjust notes about paraview library locations

applications/utilities/mesh/generation/snappyHexMesh/Make/options

@@ -1,5 +1,8 @@
+/* Add to EXE_INC as required:
+   -g -DFULLDEBUG -O0
+ */
+
 EXE_INC = \
-    /* -g -DFULLDEBUG -O0 */ \
     -I$(LIB_SRC)/parallel/decompose/decompositionMethods/lnInclude \
     -I$(LIB_SRC)/mesh/snappyHexMesh/lnInclude \
     -I$(LIB_SRC)/fileFormats/lnInclude \

applications/utilities/mesh/manipulation/renumberMesh/Make/options

@@ -1,5 +1,8 @@
+/* Add to EXE_INC as required:
+   -DFULLDEBUG -g -O0
+ */
+
 EXE_INC = \
-    /* -DFULLDEBUG -g -O0 */ \
     ${COMP_FLAGS} \
     -I$(LIB_SRC)/meshTools/lnInclude \
     -I$(LIB_SRC)/dynamicMesh/lnInclude \

applications/utilities/mesh/manipulation/zipUpMesh/Make/options

@@ -1,8 +1,11 @@
+/* Add to EXE_INC as required:
+   -DDEBUG_ZIPUP
+   -DDEBUG_CHAIN
+   -DDEBUG_ORDER
+ */
+
 EXE_INC = \
-    -I$(LIB_SRC)/meshTools/lnInclude \
-    /* -DDEBUG_ZIPUP */ \
-    /* -DDEBUG_CHAIN */ \
-    /* -DDEBUG_ORDER */
+    -I$(LIB_SRC)/meshTools/lnInclude
 
 EXE_LIBS = \
     -lmeshTools