upgrade notes

you can use --no-reload, --no-acode, --no-athumb to disable the new features described below

new features

audio transcoder
- hipster audio formats are transcoded to opus on-demand
  - aac m4a flac alac mp2 ac3 dts wma ra wav aif aiff au alaw ulaw mulaw amr gsm ape tak tta wv
- because kipu wanted to play his .au bangers from 1993
- needs FFmpeg and FFprobe, can be disabled with --no-acode
audio spectrograms
- are shown as thumbnails for audio files
- supported formats: same as transcoder + mp3 ogg opus
- needs FFmpeg and FFprobe, can be disabled with --no-athumb
textfile viewer
- with syntax hilighting
  - can be disabled by deleting web/deps/prism.js.gz or building the sfx with no-hl
- and list of textfiles in the navpane; toggle with hotkey v
navpane context dock
- snap parent folders into a panel to keep track in huge folders
- toggle-button to disable it in the navpane toolbar
config reload
- SIGUSR1 reloads the config files
  - the systemd example has been updated with ExecReload
- only does accounts, volumes, and volflags -- so any changes to args still require a full restart
- also available as a button in the control panel
  - can be disabled with --no-reload
option to specify args (command-line arguments) in the config file
url parameter ?txt to return file as utf-8 text
- or ?txt=iso-8859-1 to set a specific encoding
url parameter ?mime=text/html;charset=shift_jis to request a specific response mimetype
service script for freebsd, thx @kipukun

standalone up2k upload client was showing https warnings with -td
trailing newline missing in ?ls=t and ?ls=v
add a bunch of known mimetypes to help ms-windows a bit
lowercase all content-type charsets (firefox became case-sensitive at some point)
example for giving multiple users the same permission-set using config files did not actually work

navpane is enabled by default on sufficiently large displays
audio-player preload increased from 10 to 20 sec, giving the opus transcoder some time
finally removed the deprecated -e2s option after 9 months (replaced by -e2ds)