Update docs around "gc".
* ab/gc-docs:
gc docs: remove incorrect reference to gc.auto=0
gc docs: clarify that "gc" doesn't throw away referenced objects
gc docs: note "gc --aggressive" in "fast-import"
gc docs: downplay the usefulness of --aggressive
gc docs: note how --aggressive impacts --window & --depth
gc docs: fix formatting for "gc.writeCommitGraph"
gc docs: re-flow the "gc.*" section in "config"
gc docs: include the "gc.*" section from "config" in "gc"
gc docs: clean grammar for "gc.bigPackThreshold"
gc docs: stop noting "repack" flags
gc docs: modernize the advice for manually running "gc"
When there are more than this many packs that are not
marked with `*.keep` file in the repository, `git gc
--auto` consolidates them into one larger pack. The
- default value is 50. Setting this to 0 disables it.
+ default value is 50. Setting this to 0 disables it.
+ Setting `gc.auto` to 0 will also disable this.
+ +
+ See the `gc.bigPackThreshold` configuration variable below. When in
+ use, it'll affect how the auto pack limit works.
gc.autoDetach::
Make `git gc --auto` return immediately and run in background