Several details about 5.4.0 rc1

Corrected several small details: added 'const', adjusts in tabs x
spaces, removed unused #includes and #defines, misspellings, etc.

lvm.h

@@ -41,9 +41,9 @@
 ** Rounding modes for float->integer coercion
  */
 typedef enum {
-  F2Ieq,  /* no rounding; accepts only integral values */
+  F2Ieq,     /* no rounding; accepts only integral values */
   F2Ifloor,  /* takes the floor of the number */
-  F2Iceil,  /* takes the ceil of the number */
+  F2Iceil    /* takes the ceil of the number */
 } F2Imod;