zsh:funcs: Add psofof to list pids from lsof

.config/zsh/zshrc.d/40-functions.zsh

@@ -630,3 +630,8 @@ pdfunite() {
 
 	command "$@"
 }
+
+# List pids of processes that use an open file
+psofof() {
+	lsof "$@" | tail -n +2 | awk '{ print $2 }'
+}