Refactor the code for creating the name/number table.


git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1359 2f5784b3-3f2a-0410-8824-cb99058d5e15
Fix typo in comment.


git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1360 2f5784b3-3f2a-0410-8824-cb99058d5e15