Fix typo: s/nshashtbl/nchashtbl

Omit excessive indentation for text.

branches: 1.19.8; 1.19.12;
Mark up author name with An.

Change vnode operation lookup to return the resulting vnode *vpp unlocked.
Change cache_lookup() to return an unlocked vnode.

Discussed on tech-kern@

Welcome to 6.99.31

Use other markup. Remove trailing space.

Update docs for namecache changes.

branches: 1.15.6; 1.15.12;
Remove boilerplate in CODE REFERENCES on file paths.
Describe in intro(9) how to read paths in the CODE REFERENCES section.

Using cache_revlookup() leads to vnode races as it returns an unreferenced
vnode that may disappear before the caller has a chance to reference it.

Reference the vnode while the name cache is locked.

No objections on tech-kern.

branches: 1.13.2;
Mark up NULL with Dv.

Convert TNF licenses to new 2 clause variant

branches: 1.11.10; 1.11.12;
Note that if vp is NULL in cache_enter, a negative entry is created.

Bump date for previous.

update to match with the recent reality. PR/28793.

branches: 1.8.4;
Use
.In header.h
instead of
.Fd #include \*[Lt]header.h\*[Gt]
Much easier to read and write, and supported by groff for ages.
Okayed by ross.

"Utilize" has exactly the same meaning as "use," but it is more
difficult to read and understand. Most manuals of English style
therefore say that you should use "use".

New sentence, new line, and fix a typo.

Add a missing brace.

Generate <>& symbolically. I'm avoiding .../dist/... directories for now.

mount.9 doesn't exist (yet?)

Whitespace, punctuation fixes; sort sections, fix xrefs.

Programmer's guide to the VFS interface.