Using different delimiters in sed commands and range addresses

You can use an alternative regex delimiter as a search pattern by backslashing it:

sed '\,some/path,d'

And just use it as is for the s command:

sed 's,some/path,other/path,'

You probably want to protect other metacharacters, though; this is a good place to use Perl and quotemeta, or equivalents in other scripting languages.

From man sed:

/regexp/
Match lines matching the regular expression regexp.

\cregexpc
Match lines matching the regular expression regexp. The c may be any character other than backslash or newline.

s/regular expression/replacement/flags
Substitute the replacement string for the first instance of the regular expression in the pattern space. Any character other than backslash or newline can be used instead of a slash to delimit the RE and the replacement. Within the RE and the replacement, the RE delimiter itself can be used as a literal character if it is preceded by a backslash.