extension key sequence for mc.lib

[angel_il]

Capability to load keymap from system mc.lib file or user's mc ini instead of use hardcoded mc.lib.

For syntax example for define escape sequences see misc/mc.lib file in the source tree.

The way to get escape sequence is [F9]->Optioins->Learn Keys.
Define some key (i.e. "Function key 1"), save and exit.

Now we can see it in mc ini file:

grep 'f1=' ~/.mc/ini

Usage example:

alt left=\\e\\eOD
alt right=\\e\\eOC
alt up=\\e\\eOA
alt down=\\e\\eOB
ctrl left=\\e[D
ctrl right=\\e[C
ctrl up=\\e[A
ctrl down=\\e[B

[angel_il]

branch: 1401_mclib_extension (parent: master)
changeset: 65391ff615f757e6cecea76959c1cd559874bf0d