Rename "linenumbers" to "enable-tree-linenumbers", change default to "1"

This makes the name of the cgitrc option more descriptive and at the
same time changes the default from "0" to "1" in an attempt to stay
backwards compatible - prior to the introduction of "source-filter"
and "linenumbers", cgit always generated linenumber links in the
tree view, but now this feature can be turned off (one might want to
do this if the source-filter performs line-wrapping etc).

While at it, the documentation is updated to match the surrounding
descriptions.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

cgit.c

@@ -66,8 +66,6 @@ void config_cb(const char *name, const char *value)
 		ctx.cfg.index_info = xstrdup(value);
 	else if (!strcmp(name, "logo-link"))
 		ctx.cfg.logo_link = xstrdup(value);
-	else if (!strcmp(name, "linenumbers"))
-		ctx.cfg.linenumbers = atoi(value);
 	else if (!strcmp(name, "module-link"))
 		ctx.cfg.module_link = xstrdup(value);
 	else if (!strcmp(name, "virtual-root")) {
@@ -88,6 +86,8 @@ void config_cb(const char *name, const char *value)
 		ctx.cfg.enable_log_filecount = atoi(value);
 	else if (!strcmp(name, "enable-log-linecount"))
 		ctx.cfg.enable_log_linecount = atoi(value);
+	else if (!strcmp(name, "enable-tree-linenumbers"))
+		ctx.cfg.enable_tree_linenumbers = atoi(value);
 	else if (!strcmp(name, "max-stats"))
 		ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
 	else if (!strcmp(name, "cache-size"))
@@ -240,6 +240,7 @@ static void prepare_context(struct cgit_context *ctx)
 	ctx->cfg.css = "/cgit.css";
 	ctx->cfg.logo = "/cgit.png";
 	ctx->cfg.local_time = 0;
+	ctx->cfg.enable_tree_linenumbers = 1;
 	ctx->cfg.max_repo_count = 50;
 	ctx->cfg.max_commit_count = 50;
 	ctx->cfg.max_lock_attempts = 5;

cgit.h

@@ -173,8 +173,8 @@ struct cgit_config {
 	int enable_index_links;
 	int enable_log_filecount;
 	int enable_log_linecount;
+	int enable_tree_linenumbers;
 	int local_time;
-	int linenumbers;
 	int max_repo_count;
 	int max_commit_count;
 	int max_lock_attempts;

cgitrc.5.txt

@@ -99,6 +99,10 @@ enable-log-linecount::
 	and removed lines for each commit on the repository log page. Default
 	value: "0".
 
+enable-tree-linenumbers::
+	Flag which, when set to "1", will make cgit generate linenumber links
+	for plaintext blobs printed in the tree view. Default value: "1".
+
 favicon::
 	Url used as link to a shortcut icon for cgit. If specified, it is
 	suggested to use the value "/favicon.ico" since certain browsers will
@@ -146,10 +150,6 @@ logo-link::
 	calculated url of the repository index page will be used. Default
 	value: none.
 
-linenumbers::
-	If set to "1" lines in tree view will have numbers.
-	Default value: "0".
-
 max-commit-count::
 	Specifies the number of entries to list per page in "log" view. Default
 	value: "50".

ui-tree.c

@@ -23,7 +23,7 @@ static void print_text_buffer(const char *name, char *buf, unsigned long size)
 
 	html("<table summary='blob content' class='blob'>\n");
 
-	if (ctx.cfg.linenumbers) {
+	if (ctx.cfg.enable_tree_linenumbers) {
 		html("<tr><td class='linenumbers'><pre>");
 		idx = 0;
 		lineno = 0;