Correct units for "-dbcache" and "-prune"

All dbcache-related values in the code are measured in MiB (not in
megabytes, MB) or in bytes.
The GUI "-prune" values in GB are translated to the node values in MiB
correctly. The maximum of the "-prune" QSpinBox is not limited by the
default value of 99 (GB).
Also, this improves log readability.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/validation.h b/src/validation.h
index b5548a9293..9f420b287d 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -201,14 +201,14 @@ static const unsigned int NODE_NETWORK_LIMITED_MIN_BLOCKS = 288;
 static const signed int DEFAULT_CHECKBLOCKS = 6;
 static const unsigned int DEFAULT_CHECKLEVEL = 3;
 
-// Require that user allocate at least 550MB for block & undo files (blk???.dat and rev???.dat)
+// Require that user allocate at least 550 MiB for block & undo files (blk???.dat and rev???.dat)
 // At 1MB per block, 288 blocks = 288MB.
 // Add 15% for Undo data = 331MB
 // Add 20% for Orphan block rate = 397MB
 // We want the low water mark after pruning to be at least 397 MB and since we prune in
 // full block file chunks, we need the high water mark which triggers the prune to be
 // one 128MB block file + added 15% undo data = 147MB greater for a total of 545MB
-// Setting the target to > than 550MB will make it likely we can respect the target.
+// Setting the target to >= 550 MiB will make it likely we can respect the target.
 static const uint64_t MIN_DISK_SPACE_FOR_BLOCK_FILES = 550 * 1024 * 1024;
 
 /**