[svn-r21931] HDFFV-7689 - could not not use a "[" character in a dataset name.

A second problem also discovered was an if statement that should have comapered lengths of a string actually was comapring addreeses. Once thatt was fixed, The "[" character could be used but broke other functionality. Consultation with tools team resulted in the creation of a "--no-subset" option to disable interpretation of "[" character as a subsetting compact-form. This also eliminated and cleaned up the code containing the plomatic if statement.

Tested: local linux and added test, CMake updated autotools test to be added next.

tools/testfiles/tpbitsMaxExceeded.ddl

@@ -40,6 +40,8 @@ usage: h5dump [OPTIONS] file
                           E.g., to dump a file called `-f', use h5dump -- -f
      --enable-error-stack Prints messages from the HDF5 error stack as they
                           occur.
+     --no-compact-subset  Disable compact form of subsetting and allow the use
+                          of "[" in datset names.
 
  Subsetting is available by using the following options with a dataset
  attribute. Subsetting is done by selecting a hyperslab from the data.