docs: Update man pages

docs/man/man1/glzip.1.adoc

@@ -4,10 +4,11 @@
 
 = glzip(1)
 // Specify in UTC.
-:docdate: 2024-04-14
+:docdate: 2024-08-01
 :doctype: manpage
 :mansource: glzip 0.3.4
 :manmanual: General Commands Manual
+:lzip-spec-url: https://www.nongnu.org/lzip/manual/lzip_manual.html#File-format
 
 == NAME
 
@@ -19,8 +20,13 @@ glzip - reduces the size of files
 
 == DESCRIPTION
 
-*{manname}* is a simple command-line utility for reading and writing of lzip
-format compressed files.
+*{manname}* is a simple command-line utility for reading and writing of
+{lzip-spec-url}[lzip format] compressed files.
+
+The lzip format uses a simplified form of the LZMA stream format. In most
+cases, *{manname}* achieves better compression ratios than alternatives such as
+*gzip*(1) and *bzip2*(1). Decompression speed is faster than *bzip2*(1), but
+slower than *gzip*(1).
 
 == POSITIONAL ARGUMENTS
 
@@ -112,4 +118,4 @@ WARRANTY, to the extent permitted by law.
 
 == SEE ALSO
 
-*lzip*(1)
+*bzip2*(1), *gzip*(1), *lzip*(1)