Capitalize in various places where appropriate

These are mostly acronyms (CPUs; ZILs) but also proper nouns such as
"Unix" and "Unicode" which should also be capitalized.

Signed-off-by: Simon Howard <fraggle@gmail.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>

man/man4/spl.4

@@ -100,7 +100,7 @@ when exceeding this value.
 .It Sy spl_kmem_cache_magazine_size Ns = Ns Sy 0 Pq uint
 Cache magazines are an optimization designed to minimize the cost of
 allocating memory.
-They do this by keeping a per-cpu cache of recently
+They do this by keeping a per-CPU cache of recently
 freed objects, which can then be reallocated without taking a lock.
 This can improve performance on highly contended caches.
 However, because objects in magazines will prevent otherwise empty slabs
@@ -111,8 +111,8 @@ For this reason,
 can be used to set a maximum magazine size.
 When this value is set to 0 the magazine size will
 be automatically determined based on the object size.
-Otherwise magazines will be limited to 2-256 objects per magazine (i.e. per CPU).
-Magazines may never be entirely disabled in this implementation.
+Otherwise magazines will be limited to 2-256 objects per magazine (i.e. per
+CPU). Magazines may never be entirely disabled in this implementation.
 .
 .It Sy spl_hostid Ns = Ns Sy 0 Pq ulong
 The system hostid, when set this can be used to uniquely identify a system.

man/man4/zfs.4

@@ -1307,7 +1307,7 @@ This should be less than
 .Sy zfs_vdev_async_write_active_min_dirty_percent .
 .
 .It Sy zfs_wrlog_data_max Ns = Pq int
-The upper limit of write-transaction zil log data size in bytes.
+The upper limit of write-transaction ZIL log data size in bytes.
 Write operations are throttled when approaching the limit until log data is
 cleared out after transaction group sync.
 Because of some overhead, it should be set at least 2 times the size of
@@ -2408,7 +2408,7 @@ This controls the number of threads used by
 .Sy dp_zil_clean_taskq .
 The default value of
 .Sy 100%
-will create a maximum of one thread per cpu.
+will create a maximum of one thread per CPU.
 .
 .It Sy zil_maxblocksize Ns = Ns Sy 131072 Ns B Po 128 KiB Pc Pq uint
 This sets the maximum block size used by the ZIL.