support colons in SGR character attributes
Patch by Mikhail Kot <to@myrrc.dev> With some modifications to behave more like xterm (see note below). Example: printf '\033[48;2;255:0:0mtest\n' https://invisible-island.net/xterm/ctlseqs/ctlseqs.html Some notes: "CSI Pm m Character Attributes (SGR). [...] o xterm allows either colons (standard) or semicolons (legacy) to separate the subparameters (but after the first colon, colons must be used).
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							| @ -1202,6 +1202,7 @@ csiparse(void) | ||||
| { | ||||
| 	char *p = csiescseq.buf, *np; | ||||
| 	long int v; | ||||
| 	int sep = ';'; /* colon or semi-colon, but not both */ | ||||
|  | ||||
| 	csiescseq.narg = 0; | ||||
| 	if (*p == '?') { | ||||
| @ -1219,7 +1220,9 @@ csiparse(void) | ||||
| 			v = -1; | ||||
| 		csiescseq.arg[csiescseq.narg++] = v; | ||||
| 		p = np; | ||||
| 		if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ) | ||||
| 		if (sep == ';' && *p == ':') | ||||
| 			sep = ':'; /* allow override to colon once */ | ||||
| 		if (*p != sep || csiescseq.narg == ESC_ARG_SIZ) | ||||
| 			break; | ||||
| 		p++; | ||||
| 	} | ||||
|  | ||||
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