--disable-option-checking ignore unrecognized --enable/--with options
--disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no)
--enable-FEATURE[=ARG] include FEATURE [ARG=yes]
- --enable-fhs-paths User more FHS-like pathnames (for packagers).
+ --enable-fhs-paths Use more FHS-like pathnames (for packagers).
--enable-ipv6 Enable IPv6 support
--enable-openssl=DIR Enable OpenSSL support (DIR optional).
--disable-openssl Disable OpenSSL support.