* readelf.c (dump_type): New type used to classify the kinds of dump requested by...

* readelf.c (dump_type): New type used to classify the kinds of dump requested by the user.
  (dump_sects, cmdline_dump_sects): Use the new type.
  (options): Add --string-dump option.
  (request_dump): Rename to request_dump_bynumber.  Use dump_type.
  (request_dump_byname): Use dump_type.
  (parse_args): Parse --string-dump option.
  (process_section_headers): Fix calls to request_dump.
  (initialise_dumps_byname): Likewise.
  (dump_section): Rename to dump_section_as_bytes.
  (dump_section_as_strings): New function.  Display the contents of a section as printable strings.
  (process_section_contents): String dump the section if requested.
  (process_object): Use dump_type.
  (main): Likewise.
* Makefile.am: Add dependency for readelf.c on safe-ctype.h.
* Makefile.in: Regenerate.
* NEWS: Mention the new feature.
* doc/binutils.texi: Document the new feature.
* testsuite/binutils-all/dumptest.s: New test file.
* testsuite/binutils-all/readelf.exp: Add test of readelf's -p switch.