util.startup: Back out 598df17b8ebb
Broke signal handling again, such that an early s2s connection results
in libunbound catching signals and getting Prosody killed on e.g. SIGHUP
This returns to the situation where prosody --daemonize does not respond
to signals.
# Teal definitions and sources
This directory contains files written in the
[Teal](https://github.com/teal-language/tl) language, a typed dialect of
Lua. There are two kinds of files, `.tl` Teal source code and `.d.tl`
type definitions files for modules written in Lua. The later allows
writing type-aware Teal using regular Lua or C code.
## Setup
The Teal compiler can be installed from LuaRocks using:
```bash
luarocks install tl
```
## Checking types
```bash
tl check teal-src/prosody/util/example.tl
```
Some editors and IDEs also have support, see [text editor
support](https://github.com/teal-language/tl#text-editor-support)
## Compiling to Lua
`GNUmakefile` contains a rule for building Lua files from Teal sources.
It also applies [LuaFormat](https://github.com/Koihik/LuaFormatter) to
make the resulting code more readable, albeit this makes the line
numbers no longer match the original Teal source. Sometimes minor
`luacheck` issues remain, such as types being represented as unused
tables, which can be removed.
```bash
sensible-editor teal-src/prosody/util/example.tl
# Write some code, remember to run tl check
make util/example.lua
sensible-editor util/example.lua
# Apply any minor tweaks that may be needed
```
## Files of note
`module.d.tl`
: Describes the module environment.