updated for version 7.4.520
Problem:    Sun PCK locale is not recognzed.
Solution:   Add PCK in the table. (Keiichi Oono)
Added tag v7-4-520 for changeset 392dad030b8d
updated for version 7.4.521
Problem:    When using "vep" a mark is moved to the next line. (Maxi Padulo,
	    Issue 283)
Solution:   Decrement the line number. (Christian Brabandt)
Added tag v7-4-521 for changeset 39274bfbfba5
updated for version 7.4.522
Problem:    Specifying wrong buffer size for GetLongPathName().
Solution:   Use the actual size. (Ken Takata)
Added tag v7-4-522 for changeset 870480df8275
updated for version 7.4.523
Problem:    When the X11 server is stopped and restarted, while Vim is kept in
	    the background, copy/paste no longer works. (Issue 203)
Solution:   Setup the clipboard again. (Christian Brabandt)
Added tag v7-4-523 for changeset 9c9c70625444
Update runtime files.