Correct typos as per GH 20435

In GH 20435 many typos in our C code were corrected.  However, this pull
request was not applied to blead and developed merge conflicts.  I
extracted diffs for the individual modified files and applied them with
'git apply', excepting four files where patch conflicts were reported.
Those files were:

        handy.h
        locale.c
        regcomp.c
        toke.c

We can handle these in a subsequent commit. Also, had to run these two
programs to keep 'make test_porting' happy:

        $ ./perl -Ilib regen/uconfig_h.pl
        $ ./perl -Ilib regen/regcomp.pl regnodes.h

1 files changed, 1 insertions, 1 deletions

diff --git a/doio.c b/doio.c
index 22037d4fed..48deb13d6a 100644
--- a/doio.c
+++ b/doio.c
@@ -2794,7 +2794,7 @@ nothing in the core.
                         {
                                 /* Under AmigaOS4 unlink only 'fails' if the filename is invalid */
                                 /* It may not remove the file if it's Locked, so check if it's still */
-                                /* arround */
+                                /* around */
                                 if((access(s,F_OK) != -1))
                                 {
                                         tot--;