Apply Scrollback patch

Homepage link: https://st.suckless.org/patches/scrollback/
Patch link:
    https://st.suckless.org/patches/scrollback/st-scrollback-20200419-72e3f6c.diff
    https://st.suckless.org/patches/scrollback/st-scrollback-mouse-20191024-a2c479c.diff
    https://st.suckless.org/patches/scrollback/st-scrollback-mouse-altscreen-20200416-5703aa0.diff
    https://st.suckless.org/patches/scrollback/st-scrollback-mouse-increment-0.8.2.diff
Additional info:
+ patch applied because I'm planning on ditching tmux, which currently
  provides this functionality;
+ patches applied manually.

1 files changed, 3 insertions, 0 deletions

diff --git a/st.h b/st.h
index a1928ca..f9ad815 100644
--- a/st.h
+++ b/st.h
@@ -81,12 +81,15 @@ void die(const char *, ...);
 void redraw(void);
 void draw(void);
 
+void kscrolldown(const Arg *);
+void kscrollup(const Arg *);
 void printscreen(const Arg *);
 void printsel(const Arg *);
 void sendbreak(const Arg *);
 void toggleprinter(const Arg *);
 
 int tattrset(int);
+int tisaltscr(void);
 void tnew(int, int);
 void tresize(int, int);
 void tsetdirtattr(int);