Some minor cosmetic/wording corrections in README file

README:
  Some minor cosmetic/wording corrections
BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted

BitKeeper/etc/logging_ok

@@ -52,3 +52,4 @@ venu@work.mysql.com
 zak@balfor.local
 zak@linux.local
 arjen@george.bitbike.com
+lenz@kallisto.mysql.com

README

 This is a release of MySQL, a GPL (free) SQL database server (more
 licence information in the PUBLIC file and in the reference manual).
 
-Please read the Upgrading section in the manual if emigration from
-3.20.# to 3.21.#. Otherwise it wont work!!
+Please read the "Upgrading from..." section in the manual first, if you are
+migrating from older versions of MySQL!
 
 The latest information about MySQL can be found at:
 http://www.mysql.com
@@ -24,8 +24,8 @@ For examples of SQL and benchmarking information see the bench
 directory.
 
 The manual mentioned above can be found in the Docs directory. The
-manual is available in the following formats: as text in
-Docs/manual.txt, as HTML in Docs/manual_toc.html, as GNU Info in
+manual is available in the following formats: as plain ASCII text in
+Docs/manual.txt, in HTML format in Docs/manual_toc.html, as GNU Info in
 Docs/mysql.info and as PostScript in Docs/manual.ps.
 
 For a contributed user manual see http://www.turbolift.com/mysql.
@@ -48,7 +48,7 @@ and start your editor with a form in which you can describe your
 problem. Bug reports might be silently ignored by the MySQL
 maintainers if there is not a good reason included in the report as to
 why mysqlbug has not been used. A report that says 'MySQL does not
-work for me. Why?' is not consider a valid bug report.
+work for me. Why?' is not considered a valid bug report.
 
-The mysqlbug script can be found in the 'scripts' directory in the
-distribution, that is 'there-you-installed-mysql/scripts'.
+The mysqlbug script can be found in the 'scripts' directory of the
+distribution, that is '<where-you-installed-mysql>/scripts'.