Description:
------------
etc/curl/config.m4 uses AC_CHECK_HEADER to look for openssl/crypto.h then defines HAVE_CURL_OPENSSL.

ext/curl/interface.c expects HAVE_OPENSSL_CRYPTO_H to be defined, but that would only be the case if AC_CHECK_HEADERS was used in the config.m4 fragment instead of AC_CHECK_HEADER.



Reproduce code:
---------------
Compile with ZTS and Curl linked to OpenSSL.

Expected result:
----------------
Compile without errors.

Actual result:
--------------
/bin/sh /home/cpeasyapache/src/php-5.2.6/libtool --silent --preserve-dup-deps --mode=compile /home/cpeasyapache/src/php-5.2.6/meta_ccld  -Iext/curl/ -I/home/cpeasyapache/src/php-5.2.6/ext/curl/ -DPHP_ATOM_INC -I/home/cpeasyapache/src/php-5.2.6/include -I/home/cpeasyapache/src/php-5.2.6/main -I/home/cpeasyapache/src/php-5.2.6 -I/opt/xml2/include/libxml2 -I/opt/curlssl//include -I/home/cpeasyapache/src/php-5.2.6/ext/date/lib -I/opt/php_with_imap_client//include -I/usr/kerberos/include -I/usr/include/mysql -I/home/cpeasyapache/src/php-5.
2.6/TSRM -I/home/cpeasyapache/src/php-5.2.6/Zend  -D_REENTRANT  -I/usr/kerberos/include -pthread -DZTS  -c /home/cpeasyapache/src/php-5.2.6/ext/curl/interface.c -o ext/curl/interface.lo/home/cpeasyapache/src/php-5.2.6/ext/curl/interface.c:58:6: warning: #warning "libcurl was compiled with OpenSSL support, but configure could not find " "openssl/crypto.h; thus no SSL crypto locking callbacks will be set, which may " "cause random crashes on SSL requests"