updated patches to 7.4.022

updated patches to 7.4.022

7.4.001  'ic' doesn't work for patterns such as [a-z]
7.4.002  pattern with two alternative look-behind matches doesn't match
7.4.003  memory access error in Ruby syntax highlighting
7.4.004  when closing a window fails ":bwipe" may hang
7.4.005  "vaB" while 'virtualedit' is set selects the wrong area
7.4.006  mkdir("foo/bar/", "p") gives an error message
7.4.007  creating a preview window on startup messes up the screen
7.4.008  new regexp engine can't be interrupted
7.4.009  too easy to write a file was not decrypted (yet)
7.4.010  (after 7.4.006) crash with invalid argument to mkdir()
7.4.011  cannot find out if "acl" and "xpm" features are supported
7.4.012  MS-Windows: resolving multi-bye shortcut does not work
7.4.013  MS-Windows: File name buffer too small for utf-8
7.4.014  MS-Windows: check for writing to device does not work
7.4.015  MS-Windows: Detecting node type fails for multi-byte chars
7.4.016  MS-Windows: File name completion has problem with Chinese
7.4.017  ":help !!" does not find the "!!" tag in the help file
7.4.018  when completing item becomes unselected
7.4.019  file name completion fails with Chinese characters
7.4.020  NFA engine matches too much with \@>
7.4.021  NFA regexp: Using \ze may result in wrong end
7.4.022  deadlock while exiting, because of allocating memory