Use the new cligen/unsafeAddr idea where appropriate.

bu/execstr.nim

@@ -1,5 +1,6 @@
 when not declared(stderr): import std/syncio
 import posix, parseutils, strformat, os
+include cligen/unsafeAddr
 
 type
   Kind = enum word, assign, iRedir, oRedir, fddup, bkgd, complex

saft.nim

@@ -1,4 +1,5 @@
 when not declared(stderr): import std/syncio
+include cligen/unsafeAddr
 import cligen, cligen/[osUt, posixUt], std/[posix, strformat]
 
 template eStr: untyped = $strerror(errno)       # Error string for last errno

tails.nim

@@ -1,5 +1,6 @@
-from cligen/osUt import getDelims, uriteBuffer, ureadBuffer, c_getdelim
 when not declared(stdout): import std/syncio
+include cligen/unsafeAddr
+from cligen/osUt import getDelims, uriteBuffer, ureadBuffer, c_getdelim
 proc free(pointr: cstring) {.importc, header: "<stdlib.h>".}
 
 proc wrec(cs: cstring, n: int, eor: char): bool {.inline.} = # NOTE n-1

unfold.nim

@@ -1,5 +1,6 @@
-import cligen/osUt, re, cligen          # cligen is early for `HelpError`
 when not declared(stdin): import std/syncio
+include cligen/unsafeAddr
+import cligen/osUt, re, cligen          # cligen is early for `HelpError`
 
 proc unfold(sep="\t", n=0, before="", after="", ignore=false, extended=false) =
   ## Join blocks of stdin lines into one line sent to stdout.