Problem: Cannot set 'dictionary' to a path.
Solution: Allow for slash and backslash. Add a test (partly by Daisuke
Suzuki, closesvim/vim#1279, closesvim/vim#1284)
7554da4033
Problem: Illegal memory access when 'complete' ends in a backslash.
Solution: Check for trailing backslash. (Dominique Pelle, closesvim/vim#1478)
226c534291
Problem: When setting 'filetype' there is no check for a valid name.
Solution: Only allow valid characters in 'filetype', 'syntax' and 'keymap'.
d0b5138ba4
