gdb vs readline, 1line patch

[Emmanuel Thomé <thome at lix dot polytechnique dot fr>]

The following patch should be added to gdb since it includes readline
4.1 ; diff is against stock 5.2.1

Starting with readline 4.2, this is no longer needed (it is possible as
well to patch readline/readline.c to adopt readline's new behavior,
which is using getenv if rl_terminal_name is unset).

Not setting rl_terminal_name results in non-working $if term= directives
in .inputrc. ; this has been a long-standing bug in gdb for a while.

Cheers,

E. Thomé.

Attachment: trivial_gdb_patch
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