[SV 49114] Remove support for the NO_FLOAT compile flag.

[SV 49114] Remove support for the NO_FLOAT compile flag.

* makeint.h (max_load_average): Always a double.
* main.c (max_load_average, default_load_average): Always doubles.
(switches): -l option is a "floating" format.
(decode_switches, define_makeflags): Support "floating" format.
* remake.c (f_mtime): Show time skew as double.
* rule.c (print_rule_data_base): Show percentages as double.
* Makefile.ami, README.DOS.template, SMakefile.template: Remove
references to NO_FLOAT.
* SCOPTIONS, glob/SCOPTIONS: Remove NO_FLOAT settings.