Add help target and toxic.conf manpage

misc/toxic.conf.example

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+# 24 or 12 hour time
+time:24;
+
+# 1 to enable autologging, 0 to disable
+autolog:0;
+
+# 1 to disbale terminal alerts on messages, 0 to enable
+disable_alerts:0;
+
+# maximum lines for chat window history
+history_size:700;
+
+# 1 to use native terminal colours, 0 to use toxic default colour theme
+colour_theme:0;
+
+# preferred audio input device; numbers correspond to /lsdev in
+audio_in_dev:0;
+
+# preferred audio output device; numbers correspond to /lsdev out
+audio_out_dev:0;
+
+# preferred path for downloads
+download_path:/home/USERNAME/Downloads/;