Fix for CVE-2014-2906.
Closes a race condition in funced which would allow execution of
arbitrary code; closes a race condition in psub which would allow
alternation of the data stream.
Note that `psub -f` does not work (#1040); a fix should be committed
separately for ease of maintenance.
Closes#1437
* case no properly handles -h and --help flags, i.e. treats it as
pattern
* fixed case escaping:
The following expressions now work correctly:
switch '*'
echo '*'
echo Match any string
end
switch '*'
echo '\*'
echo Match asterix
end
switch '\\'
echo '\\\\'
echo Match slash
end
The same for '?' sign
* Editor mode is no the default
* Use -i or --interactive or -e fish to edit function in interactive
mode
* tmpname is now created with random number added and check that file
do not already exist
* check $TMPDIR existence and put /tmp if it does not exist
* There is an undocumented feature to use functions, started with dash.
Introduce necessary changes to funced, functions, def_function()
in order to make it work properly.
* Delete editor guessing. Use $EDITOR variable or -e key
