fix conf management

doc/CHANGELOG.md

@@ -25,6 +25,17 @@ Versions follow `MAJOR.MINOR.PATCH-REVISION_STAGE_N` (e.g. `3.99.1-4_rc_1`).
   fallback (no `pigz`) works again.
 - `utaz`: single top-level directory flattening, `--no-dir` target location,
   `foo.tar.gz` host directory name and `.tar.lz` extraction.
+- `conf_save`: no longer replaces a symlinked configuration file by a regular
+  one, keeps the file permissions, rejects multi-line values, and inserts a new
+  key before the trailing comments/banner of its section instead of under the
+  next section's banner; leading blanks before a `[section]` are recognised.
+- `conf_dump -a`: a commented default is no longer listed when the key is set
+  later in the same section; `NO_COLOR` is honoured; names with newlines or
+  backslashes in arguments are handled.
+- `term_set`: `COLORTERM=truecolor` no longer short-circuits every other probe
+  (it selected `xterm-direct` even inside tmux/screen or VTE terminals);
+  multiplexers (tmux, screen) are now checked before emulator hints, since they
+  inherit the emulator's variables.
 - `compress.sh`: option flags and loop variables no longer leak into the
   interactive shell.