* Fixups to the make man page

* Fixups to the make man page
* Minor syntax cleanups in the manual
* In non-maintainer mode set NDEBUG to disable assert()
* Performance improvements in strcache:
    Build Info			1000	2000	4000
    3.82 -g			2.61s	8.85s	33.52s
    3.82 -O2			1.90s	7.62s	27.82s
    New -g (with asserts)	1.03s	2.31s	5.79s
    New -O2 (no asserts)	0.65s	1.50s	3.52s