lldpd: Use /etc/os-release instead of /etc/openwrt_*

With the addition of /etc/os-release patching lldpd to use
/etc/openwrt_release and to have the initscript use
/etc/openwrt_release and/or /etc/openwrt_version becomes
unnecessary.

Signed-off-by: Daniel Dickinson <lede@daniel.thecshore.com>

package/network/services/lldpd/files/lldpd.init

@@ -10,11 +10,11 @@ LLDPSOCKET=/var/run/lldpd.socket
 
 find_release_info()
 {
-	[ -s /etc/openwrt_release ] && . /etc/openwrt_release
-	[ -z "$DISTRIB_DESCRIPTION" ] && [ -s /etc/openwrt_version ] && \
-		DISTRIB_DESCRIPTION="$(cat /etc/openwrt_version)"
+	[ -s /etc/os-release ] && . /etc/os-release
+	[ -z "$PRETTY_NAME" ] && [ -s /etc/openwrt_version ] && \
+		PRETTY_NAME="$(cat /etc/openwrt_version)"
 
-	echo "${DISTRIB_DESCRIPTION:-Unknown Lede release} @ $(cat /proc/sys/kernel/hostname)"
+	echo "${PRETTY_NAME:-Unknown Lede release} @ $(cat /proc/sys/kernel/hostname)"
 }
 
 start_service() {

package/network/services/lldpd/patches/100-os-release.patch

@@ -1,39 +0,0 @@
-Index: lldpd-0.7.15/src/daemon/lldpd.c
-===================================================================
---- lldpd-0.7.15.orig/src/daemon/lldpd.c
-+++ lldpd-0.7.15/src/daemon/lldpd.c
-@@ -736,6 +736,10 @@ lldpd_get_os_release() {
- 		fp = fopen("/usr/lib/os-release", "r");
- 	}
- 	if (!fp) {
-+		log_debug("localchassis", "could not open /usr/lib/os-release");
-+		fp = fopen("/etc/openwrt_release", "r");
-+	}
-+	if (!fp) {
- 		log_info("localchassis",
- 		    "could not open either /etc/os-release or /usr/lib/os-release");
- 		return NULL;
-@@ -745,7 +749,8 @@ lldpd_get_os_release() {
- 		key = strtok(line, "=");
- 		val = strtok(NULL, "=");
- 
--		if (strncmp(key, "PRETTY_NAME", sizeof(line)) == 0) {
-+		if (strncmp(key, "PRETTY_NAME", sizeof(line)) == 0 ||
-+		    strncmp(key, "DISTRIB_DESCRIPTION", sizeof(line)) == 0) {
- 			strlcpy(release, val, sizeof(line));
- 			break;
- 		}
-@@ -755,11 +760,11 @@ lldpd_get_os_release() {
- 	/* Remove trailing newline and all " in the string. */
- 	ptr1 = release + strlen(release) - 1;
- 	while (ptr1 != release &&
--	    ((*ptr1 == '"') || (*ptr1 == '\n'))) {
-+	    ((*ptr1 == '"') || (*ptr1 == '\n') || (*ptr1 == '\''))) {
- 		*ptr1 = '\0';
- 		ptr1--;
- 	}
--	if (release[0] == '"')
-+	if (release[0] == '"' || release[0] == '\'')
- 		return release+1;
- 	return release;
- }