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/utfebcdic.h b/utfebcdic.h
index eebbe26bd3..1aab312261 100644
--- a/utfebcdic.h
+++ b/utfebcdic.h
@@ -12,7 +12,7 @@
  *
  * To summarize, the way it works is:
  * To convert an EBCDIC code point to UTF-EBCDIC:
- *  1)	convert to Unicode.  No conversion is necesary for code points above
+ *  1)	convert to Unicode.  No conversion is necessary for code points above
  *      255, as Unicode and EBCDIC are identical in this range.  For smaller
  *      code points, the conversion is done by lookup in the PL_e2a table (with
  *      inverse PL_a2e) in the generated file 'ebcdic_tables.h'.  The 'a'