adding [TORIFIED] to "torsocks --shell" prompt

patch.diff

diff --git a/src/bin/torsocks.in b/src/bin/torsocks.in
index fe8b67a..51c4573 100644
--- a/src/bin/torsocks.in
+++ b/src/bin/torsocks.in
@@ -125,7 +125,7 @@ tor_shell ()
 {
        set_ld_preload
        echo "$0: New torified shell coming right up..."
-       ${SHELL:-/bin/sh}
+       PROMPT_COMMAND='PS1="\033[1m[TORIFIED] - $PS1"; unset PROMPT_COMMAND' ${SHELL:-/bin/sh}
 }