Fix issues with Ruby installation (via rvm) in Ubuntu 15.10

Got an error while trying to install Ruby via RVM and RBENV on Ubuntu 15.10.

compiling ossl_ssl.c
ossl_ssl.c:141:27: error: ‘SSLv3_method’ undeclared here (not in a function)
     OSSL_SSL_METHOD_ENTRY(SSLv3),
...
Makefile:293: recipe for target 'ossl_ssl.o' failed
make[2]: *** [ossl_ssl.o] Error 1
...
exts.mk:201: recipe for target 'ext/openssl/all' failed
make[1]: *** [ext/openssl/all] Error 2
...
make: *** [build-ext] Error 2

Solution #1

Apply patch during installation

curl -fsSL https://gist.github.com/mislav/055441129184a1512bb5.txt | rbenv install --patch 2.2.3

Solution #2

rvm pkg install openssl  
rvm install 2.2.2 --with-openssl-dir=$HOME/.rvm/usr
rvm --default use 2.2.2 

Fix certificates issue for solution #2

My code with HTTP requests to HTTPS sites returned me an error like this
SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (I think that solution above is the reason).

And this another fix helped

rmdir ~/.rvm/usr/ssl/certs
$ ln -s /etc/ssl/certs ~/.rvm/usr/ssl