Attempts to fix remaining checks.

- Adds more jargon to the spellchecker jargon file.
- Adds more ignores to the per-project ignores.
- Fixes clippy warnigns about uneeded clones on non-linux.
- Block/Unblock now account for system dependend newlines.

.vscode/cspell.dictionaries/jargon.wordlist.txt

@@ -59,7 +59,13 @@ microbenchmarking
 multibyte
 multicall
 noatime
+nocache
 nocreat
+noctty
+noerror
+nofollow
+nolinks
+nonblock
 nonportable
 nonprinting
 notrunc
@@ -86,6 +92,8 @@ semiprime
 semiprimes
 shortcode
 shortcodes
+siginfo
+sigusr
 subcommand
 subexpression
 submodule