2b8d0978f3
It's getting complicated to configure includes and lib dirs for OpenSSL API variants such as WolfSSL, because some settings are common and others are specific but carry a prefix that doesn't match the USE_* rule scheme. This patch simplifies everything by considering that all SSL libs will use SSL_INC, SSL_LIB, SSL_CFLAGS and SSL_LDFLAGS. That's much more convenient. This works thanks to the settings collector which explicitly checks the SSL_* settings. When USE_OPENSSL_WOLFSSL is set, then USE_OPENSSL is implied, so that there's no need to duplicate maintenance effort.