patch 9.0.0647: the 'splitscroll' option is not a good name
Problem: The 'splitscroll' option is not a good name.
Solution: Rename 'splitscroll' to 'splitkeep' and make it a string option,
also supporting "topline". (Luuk van Baal, closes #11258)
diff --git a/src/option.h b/src/option.h
index 3e6f2cb..4ce009f 100644
--- a/src/option.h
+++ b/src/option.h
@@ -924,11 +924,11 @@
EXTERN char_u *p_sps; // 'spellsuggest'
#endif
EXTERN int p_spr; // 'splitright'
-EXTERN int p_spsc; // 'splitscroll'
EXTERN int p_sol; // 'startofline'
EXTERN char_u *p_su; // 'suffixes'
EXTERN char_u *p_sws; // 'swapsync'
EXTERN char_u *p_swb; // 'switchbuf'
+EXTERN char_u *p_spk; // 'splitkeep'
EXTERN unsigned swb_flags;
// Keep in sync with p_swb_values in optionstr.c
#define SWB_USEOPEN 0x001