Fix the pages in the manual for Lix

This doesn't comprehensively fix everything outdated in the manual, or
make the manual greatly better, but it does note down where at least
jade noticed it was wrong, and it does fix all the instances of
referencing Nix to conform to the style guide to the best of our
ability.

A lot of things have been commented out for being wrong, and there are
three types of FIXME introduced:

- FIXME(Lix): generically Lix needs to fix it
- FIXME(Qyriad): re https://git.lix.systems/lix-project/lix/issues/215
- FIXME(meson): docs got outdated by meson changes and need rewriting

I did fix a bunch of it that I could, but there could certainly be
mistakes and this is definitely just an incremental improvement.

Fixes: https://git.lix.systems/lix-project/lix/issues/266
Change-Id: I5993c4603d7f026a887089fce77db08394362135

1 files changed, 2 insertions, 2 deletions

diff --git a/doc/manual/src/advanced-topics/cores-vs-jobs.md b/doc/manual/src/advanced-topics/cores-vs-jobs.md
index 9e91ab9c7..5a2e2ab0e 100644
--- a/doc/manual/src/advanced-topics/cores-vs-jobs.md
+++ b/doc/manual/src/advanced-topics/cores-vs-jobs.md
@@ -1,13 +1,13 @@
 # Tuning Cores and Jobs
 
-Nix has two relevant settings with regards to how your CPU cores will
+Lix has two relevant settings with regards to how your CPU cores will
 be utilized: `cores` and `max-jobs`. This chapter will talk about what
 they are, how they interact, and their configuration trade-offs.
 
   - `max-jobs`\
     Dictates how many separate derivations will be built at the same
     time. If you set this to zero, the local machine will do no
-    builds.  Nix will still substitute from binary caches, and build
+    builds.  Lix will still substitute from binary caches, and build
     remotely if remote builders are configured.
 
   - `cores`\