"#if FOO" still works with simple -DFOO, but gives more flexibility.
Specifically, if user expressed no preference (FOO is not defined),
we can apply reasonable defaults (this is the legitimate use of ifdef).
In short, from now on, please use
#if MG_ENABLE_FOO
instead of
#ifdef MG_ENABLE_FOO
Since we are all used to #ifdef, this change also adds a precommit check
to police this. Specifically, in *.h and *.c files that are Copyright Cesanta,
"ifdef" and "if defined()" are not allowed to be used with macros that contain
ENABLE or DISABLE, unless the like also contains "ifdef-ok".
Hence, if you are sure you want to use ifdef, use this:
#ifdef MG_ENABLE_FOO /* ifdef-ok */
PUBLISHED_FROM=9be829448f53cff575d6cae8b9945fb12531c15a
So they are distinct from CC3200 projects during import
Also update compiler version (5.2.7 -> 5.2.8)
PUBLISHED_FROM=23834212eb51ad068579726a2870e8e6ae87ab9c
Mg_hello is a simpler example for CC3200
File upload form is served on / if index.html does not exist
and always available on /upload
PUBLISHED_FROM=f844245b26febc4b952e7c52ee4519ddb542072d
