Feat: force alias ll=ls -lF, not -l nor -alF
Feat: force alias ll=ls -lF, not -l nor -alF

'lt' use 'll', to use time-format setting by setll()
add 'lla', instend of 'll=ls -alF'
remove 'mg', too obsolate.

hkuno9000/cygbin,hkuno9000/cygbin