krl_for_vim_v225_20211223

• Fix g:krlKeyWord usage
• Make Go Definition for vkrc binin case insensitive
• Use quickfixtextfunc instead of temp file
• Raise chars of shortened path in quickfix window from 3 to 5 for
  readability
• Use argument for bufnr(), compatiblity with vim <=8.1
• Add missing safe robot build in functions
• Optimize 'path' generation
• Enable spell checking only for comments and strings
• Highlight more stuff in fold lines, especially, but not only, for Vkrc
• Fix integer highlight