updated for version 7.4.008
Problem:    New regexp engine can't be interrupted.
Solution:   Check for CTRL-C pressed. (Yasuhiro Matsumoto)
Added tag v7-4-008 for changeset b04bdb2c5fce
updated for version 7.4.009
Problem:    When a file was not decrypted (yet), writing it may destroy the
	    contents.
Solution:   Mark the file as readonly until decryption was done. (Christian
	    Brabandt)
Added tag v7-4-009 for changeset 8b5d80861c5e