Raspberry pi 2 with OSMC - Restore librtmp.so to its original state


In my Raspberry pi 2 i am running updated OSMC:

Linux osmc 4.4.3-3-osmc #1 SMP PREEMPT Tue Mar 1 15:51:08 UTC 2016 armv7l GNU/Linux

i am not a linux expert and one day i tried to change librtmp.so to other external version.

Now when i install any package with apt-get install i receive following message at the end of installation:

/sbin/ldconfig.real: /usr/lib/arm-linux-gnueabihf/librtmp.so.1 is not a symbolic link

This is how i have librtmp related files:

osmc@osmc:~$ ls -la /usr/lib/arm-linux-gnueabihf/librt*
-rw-r--r-- 1 root root   58662 Mar  1 01:55 /usr/lib/arm-linux-gnueabihf/librt.a
lrwxrwxrwx 1 root root      35 Mar  1 01:55 /usr/lib/arm-linux-gnueabihf/librt.so -> /lib/arm-linux-gnueabihf/librt.so.1
-rw-r--r-- 1 root root 1759620 Dec 31 03:23 /usr/lib/arm-linux-gnueabihf/librtmp.so.1
-rw-r--r-- 1 root root   79904 May  6  2015 /usr/lib/arm-linux-gnueabihf/librtmp.so.1.bck
osmc@osmc:~$ ls -la /usr/lib/librt*
-rw-r--r-- 1 root root  132464 Dec 27 14:30 /usr/lib/librtmp.a
lrwxrwxrwx 1 root root      12 Dec 27 14:30 /usr/lib/librtmp.so -> librtmp.so.1
-rwxr-xr-x 1 root root 1759620 Dec 31 03:22 /usr/lib/librtmp.so.1

How could i restore files and links to standard files and links?

I am a linux beginner and i would not like to break my osmc installation.

Thanks in advance!