man: added sntl_finalize description;

man/sntl_finalize.3

@@ -0,0 +1 @@
+sntl_init.3

man/sntl_init.3

@@ -2,11 +2,14 @@
 .SH NAME
 sntl_init \- Initialize all required globals to run sntl library functions
 .br
+sntl_finalize \- Destroy all allocated resources for SNTL operation
+.br
 .SH SYNOPSIS
 .B #include <sntl/sntllv2.h>
 .sp
-int *sntl_init(void);
+int sntl_init(void);
 
+void sntl_finalize(void);
 .br
 .sp
 .SH DESCRIPTION
@@ -14,6 +17,8 @@ int *sntl_init(void);
 will initialize all globals required to run sntl related functions, it mostly about 
 openssl library initialization. 
 .br
+.B sntl_finalize 
+will destroy all resources allocated for SNTL library operation.
 .SH RETURN VALUE
 Always returns 
 .B 0 
@@ -28,6 +33,10 @@ None.
 .SH APPLICATION USAGE
 Call this function from the main thread before using sntl library. Otherwise it will not works. There are also 
 useful to know if you are using other openssl functionality there are no need to initialize globals for it.
+.br
+If you are using openssl, don't call
+.B sntl_finalize
+until you will finish with them.
 .SH RATIONALE
 None.
 .SH SEE ALSO