Extended-remote fork event docs

This patch contains the accumulated documentation changes for the
rest of the extended-remote follow fork patchset.

gdb/ChangeLog:

        * NEWS: Announce fork support in the RSP and support
          for fork debugging in extended mode.

gdb/doc/ChangeLog:

        * gdb.texinfo (Forks): Note that fork debugging is
          supported in extended mode.
          (Remote Configuration): Add fork event features to table
          of packet settings.
          (Stop Reply Packets): Add fork events to list of stop reasons.
          (General Query Packets): Add fork events to tables of
          'gdbfeatures' and 'stub features' supported in the qSupported
          packet, as well as to the list containing stub feature
          details.

1 files changed, 24 insertions, 0 deletions

diff --git a/gdb/NEWS b/gdb/NEWS
index 51e4f4e..bf12101 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -128,6 +128,30 @@ qXfer:exec-file:read
   Return the full absolute name of the file that was executed to
   create a process running on the remote system.
 
+fork stop reason
+  Indicates that a fork system call was executed.
+
+vfork stop reason
+  Indicates that a vfork system call was executed.
+
+vforkdone stop reason
+  Indicates that a vfork child of the specified process has executed
+  an exec or exit, allowing the vfork parent to resume execution.
+
+fork-events and vfork-events features in qSupported
+  The qSupported packet allows GDB to request support for fork and 
+  vfork events using new 'gdbfeatures' fork-events and vfork-events,
+  and the qSupported response can contain the corresponding
+  'stubfeatures'.  Set and show commands can be used to display
+  whether these features are enabled.
+
+* Extended-remote fork events
+
+  ** GDB now has support for fork events on extended-remote Linux
+     targets.  For targets with Linux kernels 2.5.60 and later, this
+     enables follow-fork-mode and detach-on-fork for both fork and
+     vfork, as well as fork and vfork catchpoints.
+
 * The info record command now shows the recording format and the
   branch tracing configuration for the current thread when using
   the btrace record target.