It works well now on Centos 6 using these symlinks:
# ln -s /usr/lib/libssl.so.1.0.0 /usr/lib/libssl.so.6
# ln -s /usr/lib/libcrypto.so.1.0.0 /usr/lib/libcrypto.so.6
# ls -lrt /usr/lib/libssl*
-rwxr-xr-x. 1 root root 221776 Dec 19 21:25 /usr/lib/libssl3.so
-rwxr-xr-x. 1 root root 354976 Jan 25 03:12 /usr/lib/libssl.so.1.0.0
lrwxrwxrwx. 1 root root 15 Feb 6 23:53 /usr/lib/libssl.so.10 -> libssl.so.1.0.0
lrwxrwxrwx. 1 root root 24 Feb 7 00:10 /usr/lib/libssl.so.6 -> /usr/lib/libssl.so.1.0.0
# ls -lrt /usr/lib/libcrypto*
-rwxr-xr-x. 1 root root 1604324 Jan 25 03:12 /usr/lib/libcrypto.so.1.0.0
lrwxrwxrwx. 1 root root 18 Feb 6 23:53 /usr/lib/libcrypto.so.10 -> libcrypto.so.1.0.0
