Applied fixes/suggestions from mksh maintainer:

Applied fixes/suggestions from mksh maintainer:

21:36 <mirabilos> replace `id -u` with $USER_ID
21:36 <mirabilos> it's set by mksh

21:36 <mirabilos> and PLEASE do not use `
21:36 <mirabilos> especially as one cannot reliably use quotes inside it

21:37 <mirabilos> line 30-39 are also obsolete (in fact, dangerous)
(refering to keyboard binding)

22:11 <mirabilos> you could use [[ (and (( for the USER_ID comparison)
22:11 <mirabilos> that would save some ""
22:11 <mirabilos> the echo argument could use some "" though

22:12 <mirabilos> and it was agreed among shell developers that default configs SHOULD NOT export PS1

Changed files:
    mksh-mkshrc -> 1.3