nginx: introduce support for dynamic modules

[Ansuel]

Start building sub package that provide dynamic modules.
Each module needs to be loaded using load_modules. Refer
to nginx documentation on how to use this.
This should result in lower memory usage as only used module
are loaded.

This is a first step to dynamic loading... Some testing is needed and i still need to add description to the new package.

Requested from: #16833

Signed-off-by: Christian Marangi ansuelsmth@gmail.com

[Ansuel]

@alex9434 Are you still interested? Sorry for the delay of 2 years :(

[Ansuel]

@peter-stadler Are you ok with the change for the module? Or do you have suggestion on how to implement?

[Ansuel]

@hgl If you want to check this...

[hgl]

Awesome work! I'll try it out on my device soon.

A couple of questions from first glance:

1. Is using pcre instead of pcre2 a compromise for support of some dynamic modules?
2. Did you get any warnings from the lua module that the nginx it lives in is not from OpenResty?
3. Since new package names are introduced, do you think it would be a good opportunity to rename nginx-all-module to nginx-full as mentioned in my discussion with Peter, since a lot of popular packages use the -full suffix, like dnsmasq-full, ip-full?

[Ansuel]

1. Is using pcre instead of pcre2 a compromise for support of some dynamic modules?

as said in the commit it's for lua module... since both are supported by nginx is it a problem to use pcre instead of pcre2?

2. Did you get any warnings from the lua module that the nginx it lives in is not from OpenResty?

the lua module still needs some love as the openresty core and lrucache are still required (and also adding the correct path in the config) but if some user wants to use it we at least provide it. (manual modification are needed anyway since the module is loaded dynamically and that needs to be manually added to the nginx config)

3. Since new package names are introduced, do you think it would be a good opportunity to rename nginx-all-module to nginx-full as mentioned in my discussion with Peter, since a lot of popular packages use the -full suffix, like dnsmasq-full, ip-full?

Yep sure! Also since we are doing this name change... wonder if we can just drop the package name... guess we had enough time to make every user transition to it?

[Ansuel]

No idea why CI fails to build.

[npenin]

Any chance to also have the njs module? And also a package for the njs standalone executable?

[Ansuel]

@npenin for standalone no idea... but for the module... as you can see it's pretty easy to add additional external module now...

[alex9434]

Great, thank you. Will try it out now!