update man pages

textcode/scan_base64.3

@@ -20,7 +20,7 @@ Many base64 variants demand padding in the last block. Some don't. This
 implementation will consume padding if it is there, but will not
 complain if it is not.
 
-dest can be NULL. destlen can be NULL.
+dest can be NULL. destlen can be NULL. dest can be src.
 
 .SH "RETURN VALUE"
 scan_base64 returns the number of bytes successfully scanned and

textcode/scan_base64url.3

@@ -20,7 +20,7 @@ Many base64 variants demand padding in the last block. Some don't. This
 implementation will consume padding if it is there, but will not
 complain if it is not.
 
-dest can be NULL. destlen can be NULL.
+dest can be NULL. destlen can be NULL. dest can be src.
 
 .SH "RETURN VALUE"
 scan_base64url returns the number of bytes successfully scanned and

textcode/scan_cescape.3

@@ -18,7 +18,7 @@ supported and lead to UTF-8 sequences being output.
 scan_cescape will then write the number of bytes in dest into *destlen,
 and return the number of bytes decoded from src.
 
-dest can be NULL. destlen can be NULL.
+dest can be NULL. destlen can be NULL. dest can be src.
 
 To make sure dest is large enough, either allocate strlen(src)+1 bytes
 or call scan_cescape twice, the first time with dest == NULL (*destlen

textcode/scan_hexdump.3

@@ -16,7 +16,7 @@ Note that real world hexdump data is sometimes permitted to
 contain whitespace characters or new lines. This function will not allow
 those and return the decoded data until then.
 
-dest can be NULL. destlen can be NULL.
+dest can be NULL. destlen can be NULL. dest can be src.
 
 .SH "RETURN VALUE"
 scan_hexdump returns the number of bytes successfully scanned and

textcode/scan_jsonescape.3

@@ -14,7 +14,7 @@ characters or a double quote that was not escaped.
 It will then write the number of bytes in dest into *destlen,
 and return the number of bytes decoded from src.
 
-dest can be NULL. destlen can be NULL.
+dest can be NULL. destlen can be NULL. dest can be src.
 
 To make sure dest is large enough, either allocate strlen(src)+1 bytes
 or call scan_jsonescape twice, the first time with dest == NULL (*destlen

textcode/scan_ldapescape.3

@@ -16,11 +16,9 @@ equivalent, i.e. \0a to new-line and \5c to backslash.
 scan_cescape will then write the number of bytes in dest into *destlen,
 and return the number of bytes decoded from src.
 
-dest can be NULL. destlen can be NULL.
+dest can be NULL. destlen can be NULL. dest can be src.
 
-To make sure dest is large enough, either allocate strlen(src)+1 bytes
+The decoded data need at most as much space as the encoded data used.
-or call scan_ldapescape twice, the first time with dest == NULL (*destlen
-will still be written).
 
 .SH "RETURN VALUE"
 scan_ldapescape returns the number of bytes successfully parsed

textcode/scan_urlencoded.3

@@ -19,7 +19,7 @@ In "http://example.com/a+b?c+d", only the second plus can be decoded
 as a space character. If you want + decoded to space, use
 scan_urlencoded2.
 
-dest can be NULL. destlen can be NULL.
+dest can be NULL. destlen can be NULL. dest can be src.
 
 .SH "RETURN VALUE"
 scan_urlencoded returns the number of bytes successfully scanned and

textcode/scan_urlencoded2.3

@@ -11,7 +11,7 @@ scan_urlencoded2 behaves like scan_urlencoded, but decodes '+' to ' '.
 
 See scan_urlencoded(3) for details.
 
-dest can be NULL. destlen can be NULL.
+dest can be NULL. destlen can be NULL. dest can be src.
 
 .SH "RETURN VALUE"
 scan_urlencoded2 returns the number of bytes successfully scanned and

textcode/scan_uuencoded.3

@@ -23,7 +23,7 @@ input, and it will decode all the bytes in it.
 uuencoded data can contain bytes from 0x21 to 0x96, which means it is
 not "string safe" (can contain single and double quotes and backslash).
 
-dest can be NULL. destlen can be NULL.
+dest can be NULL. destlen can be NULL. dest can be src.
 
 .SH "RETURN VALUE"
 scan_uuencoded returns the number of bytes successfully scanned and