Use 2 spaces indent
Fix description of --without-pcre
Fix a typo

--without-pcre didn't work. :<
package windows: introduce variable for readability
Remove needless header file inclusions
Simplify debug flag
groonga-httpd: support cross compile build

It's not buildable yet.
groonga-httpd: make buildable for Windows
package windows: extract download feature
Remove needless require
package windows: use double quote (") for string literal
package windows: support building zlib
package windows: support building PCRE
package windows: support building LZ4
package windows: fix a typo
groonga-httpd: use "mingw" for detecting cross compile
package windows: simplify
groonga-httpd windows: force to disable PCRE and zlib with MinGW build

Because nginx doesn't support cross-compile of them.
packages windows: remove PCRE build

Because groonga-httpd can't use it.
package windows: enable groonga-httpd