calc/calc.el (calc-logunits-field-reference) Renamed from

calc/calc.el (calc-logunits-field-reference) Renamed from
`calc-default-field-reference-level'.
(calc-logunits-power-reference): Renamed from `calc-default-power-reference-level'

calc/calc-units.el (math-logunits-quant):  Renamed from `math-logunits-level'
(math-logunits-plus):  Renamed from math-logcombine.
(calcFunc-luplus, calcFunc-luminus calc-luplus, calc-luminus): Remove functions.
(calcFunc-lufieldplus, calcFunc-lupowerplus, calcFunc-lufieldminus)
(calcFunc-lufieldminus,calc-logunits-plus calc-logunits-minus): New functions.
(calcFunc-fieldquant): Renamed from `calcFunc-fieldlevel'.
(calcFunc-powerquant): Renamed from `calcFunc-powerlevel'.
(calc-logunits-quantity): Renamed from `calc-level'.
(calcFunc-dbfieldlevel, calcFunc-dbpowerlevel, calcFunc-npfieldlevel)
(calcFunc-nppowerlevel,calc-logunits-dblevel, calc-logunits-nplevel)
(math-logunits-times, calcFunc-lufieldtimes, calcFunc-lupowertimes)
(calc-logunits-times, math-logunits-divide, calcFunc-lufielddiv)
(calcFunc-lupowerdiv,calc-logunits-divide,math-logunits-level):
New functions.

calc-help.el (calc-u-prefix-help): Removed "L" reference.
(calc-ul-prefix-help): Remove.
(calc-l-prefix-help): New function.
(calc-full-help): Add reference to `calc-l-prefix-help'.

calc-ext.el (calc-init-extensions): Update autoloads.