vale/style: Utilize vales vocabulary engine

- Remove spelling-exceptions list
- Vale has it's own engine to add custom vocabulary for adding project
  specific keywords. Add a vocabulary named Terms
- Add the file accept.txt which words should be accepted without any
  errors
- Utilize documentation/content/en/books/arch-handbook/mac/_index.adoc
  as proof of concept to remove all sort of errors/warnings/suggestion.
  - Remove EOLSpace
  - Fix Semantic Line Breakings
  - Add relevant keywords to the new Vocab file accept.txt
  - Some codewords were not marked with single tick ` so mark those properly
    that spelling engine do not throw errors

Approved by:	carlavilla (mentor)
Differential Revision:	https://reviews.freebsd.org/D39703

.vale.ini

@@ -1,5 +1,6 @@
 StylesPath = .vale/styles
 MinAlertLevel = suggestion
+Vocab = Terms
 
 [asciidoctor]
 # enable

.vale/styles/FreeBSD/spelling-exceptions.txt

@@ -1,79 +0,0 @@
-Accetta
-Beranek
-Cheriton
-[Cc]hroot
-DARPA
-Englewood
-Ethernets
-Ewens
-Excelan
-FIFOs
-Filestores
-Fortran
-Gandi
-Gingell
-Interlan
-Interprocess
-Karels
-Kbyte
-Kernighan
-Macklem
-Makefile
-Microsystems
-O'Reilly
-Ousterhout
-Ritchie
-Rosenblum
-Rozier
-Sebastopol
-Tevanian
-Winsock
-autoconfiguration
-basename
-chdir
-checksubdir
-chmod
-chown
-coroutine
-coroutines
-datagrams
-deallocate
-deallocation
-descendents
-distfile
-errno
-execve
-fchmod
-fchown
-filestore
-filestores
-fstat
-interprocess
-lseek
-malloc
-mkdir
-mknod
-mmap
-multiuser
-noncanonical
-nongraphic
-pathnames
-poudriere
-prepended
-public_html
-[Qq]uarterly
-readv
-recv
-recvfrom
-recvmsg
-reimplemented
-rmdir
-rmport
-sendmsg
-sendto
-subhierarchies
-subdirectory
-unbuffered
-untyped
-vnode
-writev

.vale/styles/Vocab/Terms/accept.txt

@@ -0,0 +1,32 @@
+(?i)bpf
+APIs
+Biba
+DTDs
+Redistributions
+Safeport
+[Dd]atagram
+[Dd]evfs
+[Mm]map
+[Uu]serland
+[Vv]node
+demultiplexer
+dereference
+errno
+ioctls
+lookups
+mbuf
+multicast
+multilabel
+multithreaded
+mutex
+namespace
+procfs
+pluggable
+statfs
+syscall
+sysctl\'s
+tunables
+uid
+unloadable
+vp
+wakeup