Making Config use HomeBase q

+ Cleaning up Start INI handling with new StartIni class
+ Eliminating recursive sub-ini directory issue
+ Adding NaturalSort utility class
+ Adding FS utility class

Conflicts:
	jetty-start/src/main/java/org/eclipse/jetty/start/Config.java
	jetty-start/src/main/java/org/eclipse/jetty/start/Main.java
Fixing up confusion over OPTIONS vs OPTION
Using try-with-resources more consistently
Fixing enable/disable

Conflicts:
	jetty-start/src/main/java/org/eclipse/jetty/start/Main.java
Consolidating filters
jetty.base is always defined.
414635 Modular start.d and jetty.base property

Merged branch jetty-9.1-altstart with cherry picks of
ecf30e4
72f8143
998f95b
46a9495
fe4b922
3443593
2b40990
07636db
4e1a62b
aed6811
578613e
b1b394b