Rename "set/show remotebaud" command into "set/show serial baud"

This patch renames the "set/show remotebaud" commands into
"set/show serial baud", and moves its implementation into serial.c.
It also moves the "baud_rate" global from top.c to serial.c, where
the new code is being added (the alternative was to add an include
of target.h).

And to facilitate the transition to the new setting name, this
patch also preserves the old commands, and marks them as deprecated
to alert the users of the change.

gdb/ChangeLog:

        * cli/cli-cmds.c (show_baud_rate): Moved to serial.c as
        serial_baud_show_cmd.
        (_initialize_cli_cmds): Delete the code creating the
        "set/show remotebaud" commands.
        * serial.c (baud_rate): Move here from top.c.
        (serial_baud_show_cmd): Move here from cli/cli-cmds.c.
        (_initialize_serial): Create "set/show serial baud" commands.
        Add "set/show remotebaud" command aliases.
        * top.c (baud_rate): Moved to serial.c.
        * NEWS: Document the new "set/show serial baud" commands,
        replacing "set/show remotebaud".

gdb/doc/ChangeLog:

        * gdb.texinfo: Replace "set remotebaud" and "show remotebaud"
        by "set serial baud" and "show serial baud" (resp) throughout.

1 files changed, 0 insertions, 7 deletions

diff --git a/gdb/top.c b/gdb/top.c
index d9128a3..c473d8c 100644
--- a/gdb/top.c
+++ b/gdb/top.c
@@ -144,13 +144,6 @@ int saved_command_line_size = 100;
    is issuing commands too.  */
 int server_command;
 
-/* Baud rate specified for talking to serial target systems.  Default
-   is left as -1, so targets can choose their own defaults.  */
-/* FIXME: This means that "show remotebaud" and gr_files_info can
-   print -1 or (unsigned int)-1.  This is a Bad User Interface.  */
-
-int baud_rate = -1;
-
 /* Timeout limit for response from target.  */
 
 /* The default value has been changed many times over the years.  It