*: get rid of zlog(*, LOG_LEVEL, ...)

*: get rid of zlog(*, LOG_LEVEL, ...)

Result of running the following Coccinelle patch + fixups:
<<EOF
/* long-forms: zlog(NULL, <level>, ...)
 *    =>       zlog_level(...)
 */

@@
expression list args;
@@
- zlog(NULL, LOG_DEBUG, args)
+ zlog_debug(args)

@@
expression list args;
@@
- zlog(NULL, LOG_NOTICE, args)
+ zlog_notice(args)

@@
expression list args;
@@
- zlog(NULL, LOG_INFO, args)
+ zlog_info(args)

@@
expression list args;
@@
- zlog(NULL, LOG_WARNING, args)
+ zlog_warn(args)

@@
expression list args;
@@
- zlog(NULL, LOG_ERR, args)
+ zlog_err(args)

/* long-forms: zlog(base->log, <level>, ...)
 *    =>       zlog_level(...)
 */

@@
expression base;
expression list args;
@@
- zlog(base->log, LOG_DEBUG, args)
+ zlog_debug(args)

@@
expression base;
expression list args;
@@
- zlog(base->log, LOG_NOTICE, args)
+ zlog_notice(args)

@@
expression base;
expression list args;
@@
- zlog(base->log, LOG_INFO, args)
+ zlog_info(args)

@@
expression base;
expression list args;
@@
- zlog(base->log, LOG_WARNING, args)
+ zlog_warn(args)

@@
expression base;
expression list args;
@@
- zlog(base->log, LOG_ERR, args)
+ zlog_err(args)

EOF

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>