ncurses-5.7: libtool version-info

[Peter Häring]

ncurses compiled without libtool produces shared libraries with version 
*.so.5.7. Compiled with libtool, shared libraries have version *.so.5.0.7.

libtool --mode-link -version-info 5:7 makes this.
Existing projects, especially when libtool is optionally, should use 
-version-number instead of -version-info (see libtool documentation).
So, when replacing all occurences of version-info by version-number, shared 
libraries get version *.so.5.7.0, wich is compatible with same version 
compiled without libtool.

Patch sources with the following sed:
sed -i s/version-info/version-number/ aclocal.m4 c++/Makefile.in configure 
mk-1st.awk

Greetings. 
-----------------------------
Pfarrer Dr. Peter Häring
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