lighttpd: switch to meson

Simplifies the Makefile and allows faster compilation with Ninja.

Added patch to fix libmariadb dependency.

Added extra modules.

Speed Before:

time make package/lighttpd/compile -j 12
Executed in   47.91 secs   fish           external
   usr time   41.83 secs  384.00 micros   41.83 secs
   sys time   10.79 secs   37.00 micros   10.79 secs

Speed After:

time make package/lighttpd/compile -j 12
Executed in   19.67 secs   fish           external
   usr time   42.79 secs  377.00 micros   42.79 secs
   sys time    8.56 secs   37.00 micros    8.56 secs

Tested with fish shell.

Signed-off-by: Rosen Penev <rosenp@gmail.com>