libssh2_exit and libssh2_sftp_readdir man page fixes

docs/libssh2_exit.3

@@ -4,7 +4,7 @@ libssh2_exit - global library deinitialization
 .SH SYNOPSIS
 #include <libssh2.h>
 
-int
+void
 libssh2_exit(void);
 .SH DESCRIPTION
 Exit the libssh2 functions and free's all memory used internal.

docs/libssh2_sftp_readdir.3

@@ -2,7 +2,7 @@
 .\"
 .TH libssh2_sftp_readdir 3 "20 Feb 2010" "libssh2 1.2.4" "libssh2 manual"
 .SH NAME
-libssh2_sftp_readdir - convenience macro for \fIlibssh2_sftp_readdir_exa(3)\fP calls
+libssh2_sftp_readdir - convenience macro for \fIlibssh2_sftp_readdir_ex(3)\fP calls
 .SH SYNOPSIS
 #include <libssh2.h>
 
@@ -10,10 +10,10 @@ libssh2_sftp_readdir(arguments)
 
 .SH DESCRIPTION
 This is a macro defined in a public libssh2 header file that is using the
-underlying function \fIlibssh2_sftp_readdir_exa(3)\fP.
+underlying function \fIlibssh2_sftp_readdir_ex(3)\fP.
 .SH RETURN VALUE
-See \fIlibssh2_sftp_readdir_exa(3)\fP
+See \fIlibssh2_sftp_readdir_ex(3)\fP
 .SH ERRORS
-See \fIlibssh2_sftp_readdir_exa(3)\fP
+See \fIlibssh2_sftp_readdir_ex(3)\fP
 .SH SEE ALSO
-.BR \fIlibssh2_sftp_readdir_exa(3)\fP
+.BR \fIlibssh2_sftp_readdir_ex(3)\fP