treewide: drop "RUN_" from "RUN_WITH_UMASK"

RUN_WITH_UMASK was initially conceived for spawning externals progs with the
umask set. But nowadays we use it various syscalls and stuff that doesn't "run"
anything, so the "RUN_" prefix has outlived its usefulness.

src/basic/umask-util.h

@@ -15,12 +15,12 @@ static inline void umaskp(mode_t *u) {
 
 /* We make use of the fact here that the umask() concept is using only the lower 9 bits of mode_t, although
  * mode_t has space for the file type in the bits further up. We simply OR in the file type mask S_IFMT to
- * distinguish the first and the second iteration of the RUN_WITH_UMASK() loop, so that we can run the first
- * one, and exit on the second. */
+ * distinguish the first and the second iteration of the WITH_UMASK() loop, so that we can run the first one,
+ * and exit on the second. */
 
 assert_cc((S_IFMT & 0777) == 0);
 
-#define RUN_WITH_UMASK(mask)                                            \
+#define WITH_UMASK(mask)                                            \
         for (_cleanup_umask_ mode_t _saved_umask_ = umask(mask) | S_IFMT; \
              FLAGS_SET(_saved_umask_, S_IFMT);                          \
              _saved_umask_ &= 0777)