[RFA_v3 0/8] Implement 'frame apply COMMAND', enhance 'thread apply COMMAND'

[Philippe Waroquiers <philippe dot waroquiers at skynet dot be>]

This is the fourth iteration of the patch series that:
 * implements a new command
     'frame apply [all | COUNT | -COUNT | id ID...] [FLAG]... COMMAND'.
 * enhance 'thread apply COMMAND' by adding FLAG arguments.
 * adds some shortcuts commands.
 * documents the above in gdb.texinfo and NEWS.
 * adds a unit test for cli-utils.c.
 * adds test for 'frame apply'.
 * modify gdb.threads/pthreads.exp to test 'thread apply' FLAG arguments.

The fourth version is RFA v3. It handles the comments given by Pedro.
The main changes compared to RFA v2 are:
  * The -q (quiet) flag replaces the verbosity/-v/-q concept.
  * Addition of 'frame apply id ID... [FLAG]... COMMAND' to allow
    applying a command on a selected list of frames.
  * [FLAG]... arguments are now parsed iteratively.
  * Documentation and on-line help updated accordingly.
  * tests updated accordingly.

The third version was RFA v2, handling the comments of Pedro about giving
the flags individually.
The changes compared to RFA v1 is:
  * The flags must be given individually, such as -v -v -c.
  * The documentation and on-line help was updated accordingly.
  * ChangeLog information is distributed in each commit log message.

The second version was RFA v1, changes compared to RFC are:
  * Replied to all comments of Eli and Simon.
  * Tests and ChangeLog entries added.
  * Comments received from Pedro

The first version was an RFC
  * Code and doc was complete, but was lacking ChangeLog and tests.
  * Comments received from Eli and Simon.